diff --git a/apps/openmw/mwscript/soundextensions.cpp b/apps/openmw/mwscript/soundextensions.cpp
index d7aada989..40229475e 100644
--- a/apps/openmw/mwscript/soundextensions.cpp
+++ b/apps/openmw/mwscript/soundextensions.cpp
@@ -26,10 +26,10 @@ namespace MWScript
                     MWScript::InterpreterContext& context
                         = static_cast<MWScript::InterpreterContext&> (runtime.getContext());
                    
-                    std::string file = runtime.getStringLiteral (runtime[0]);
+                    std::string file = runtime.getStringLiteral (runtime[0].mInteger);
                     runtime.pop();
 
-                    std::string text = runtime.getStringLiteral (runtime[0]);
+                    std::string text = runtime.getStringLiteral (runtime[0].mInteger);
                     runtime.pop();
                         
                     context.getSoundManager().say (context.getReference(), file, text,
@@ -60,7 +60,7 @@ namespace MWScript
                     MWScript::InterpreterContext& context
                         = static_cast<MWScript::InterpreterContext&> (runtime.getContext());
                    
-                    std::string sound = runtime.getStringLiteral (runtime[0]);
+                    std::string sound = runtime.getStringLiteral (runtime[0].mInteger);
                     runtime.pop();
                         
                     context.getSoundManager().streamMusic (sound, context);
@@ -76,7 +76,7 @@ namespace MWScript
                     MWScript::InterpreterContext& context
                         = static_cast<MWScript::InterpreterContext&> (runtime.getContext());
                    
-                    std::string sound = runtime.getStringLiteral (runtime[0]);
+                    std::string sound = runtime.getStringLiteral (runtime[0].mInteger);
                     runtime.pop();
                         
                     context.getSoundManager().playSound (sound, 1.0, 1.0, context);
@@ -92,13 +92,13 @@ namespace MWScript
                     MWScript::InterpreterContext& context
                         = static_cast<MWScript::InterpreterContext&> (runtime.getContext());
                    
-                    std::string sound = runtime.getStringLiteral (runtime[0]);
+                    std::string sound = runtime.getStringLiteral (runtime[0].mInteger);
                     runtime.pop();
                     
-                    float volume = *reinterpret_cast<float *> (&runtime[0]);
+                    Interpreter::Type_Float volume = runtime[0].mFloat;
                     runtime.pop();
 
-                    float pitch = *reinterpret_cast<float *> (&runtime[0]);
+                    Interpreter::Type_Float pitch = runtime[0].mFloat;
                     runtime.pop();
                         
                     context.getSoundManager().playSound (sound, volume, pitch, context);
@@ -118,7 +118,7 @@ namespace MWScript
                     MWScript::InterpreterContext& context
                         = static_cast<MWScript::InterpreterContext&> (runtime.getContext());
                    
-                    std::string sound = runtime.getStringLiteral (runtime[0]);
+                    std::string sound = runtime.getStringLiteral (runtime[0].mInteger);
                     runtime.pop();
                                             
                     context.getSoundManager().playSound3D (context.getReference(), sound,
@@ -139,13 +139,13 @@ namespace MWScript
                     MWScript::InterpreterContext& context
                         = static_cast<MWScript::InterpreterContext&> (runtime.getContext());
                    
-                    std::string sound = runtime.getStringLiteral (runtime[0]);
+                    std::string sound = runtime.getStringLiteral (runtime[0].mInteger);
                     runtime.pop();
                                         
-                    float volume = *reinterpret_cast<float *> (&runtime[0]);
+                    Interpreter::Type_Float volume = runtime[0].mFloat;
                     runtime.pop();
 
-                    float pitch = *reinterpret_cast<float *> (&runtime[0]);
+                    Interpreter::Type_Float pitch = runtime[0].mFloat;
                     runtime.pop();
                         
                     context.getSoundManager().playSound3D (context.getReference(), sound, volume,
@@ -163,7 +163,7 @@ namespace MWScript
                     MWScript::InterpreterContext& context
                         = static_cast<MWScript::InterpreterContext&> (runtime.getContext());
                    
-                    std::string sound = runtime.getStringLiteral (runtime[0]);
+                    std::string sound = runtime.getStringLiteral (runtime[0].mInteger);
                     runtime.pop();
                                             
                     context.getSoundManager().stopSound3D (context.getReference(), sound, context);
@@ -179,7 +179,7 @@ namespace MWScript
                     MWScript::InterpreterContext& context
                         = static_cast<MWScript::InterpreterContext&> (runtime.getContext());
                         
-                    int index = runtime[0];
+                    int index = runtime[0].mInteger;
                     runtime.pop();
                         
                     runtime.push (context.getSoundManager().getSoundPlaying (
@@ -196,13 +196,13 @@ namespace MWScript
                     MWScript::InterpreterContext& context
                         = static_cast<MWScript::InterpreterContext&> (runtime.getContext());
 
-                    std::string id = runtime.getStringLiteral (runtime[0]);
+                    std::string id = runtime.getStringLiteral (runtime[0].mInteger);
                     runtime.pop();
                    
-                    std::string file = runtime.getStringLiteral (runtime[0]);
+                    std::string file = runtime.getStringLiteral (runtime[0].mInteger);
                     runtime.pop();
 
-                    std::string text = runtime.getStringLiteral (runtime[0]);
+                    std::string text = runtime.getStringLiteral (runtime[0].mInteger);
                     runtime.pop();
                         
                     context.getSoundManager().say (context.getWorld().getPtr (id, true),
@@ -219,7 +219,7 @@ namespace MWScript
                     MWScript::InterpreterContext& context
                         = static_cast<MWScript::InterpreterContext&> (runtime.getContext());
 
-                    std::string id = runtime.getStringLiteral (runtime[0]);
+                    std::string id = runtime.getStringLiteral (runtime[0].mInteger);
                     runtime.pop();
                                             
                     runtime.push (context.getSoundManager().sayDone (
@@ -240,10 +240,10 @@ namespace MWScript
                     MWScript::InterpreterContext& context
                         = static_cast<MWScript::InterpreterContext&> (runtime.getContext());
 
-                    std::string id = runtime.getStringLiteral (runtime[0]);
+                    std::string id = runtime.getStringLiteral (runtime[0].mInteger);
                     runtime.pop();
                                        
-                    std::string sound = runtime.getStringLiteral (runtime[0]);
+                    std::string sound = runtime.getStringLiteral (runtime[0].mInteger);
                     runtime.pop();
                                             
                     context.getSoundManager().playSound3D (
@@ -264,16 +264,16 @@ namespace MWScript
                     MWScript::InterpreterContext& context
                         = static_cast<MWScript::InterpreterContext&> (runtime.getContext());
 
-                    std::string id = runtime.getStringLiteral (runtime[0]);
+                    std::string id = runtime.getStringLiteral (runtime[0].mInteger);
                     runtime.pop();
                                        
-                    std::string sound = runtime.getStringLiteral (runtime[0]);
+                    std::string sound = runtime.getStringLiteral (runtime[0].mInteger);
                     runtime.pop();
                                         
-                    float volume = *reinterpret_cast<float *> (&runtime[0]);
+                    Interpreter::Type_Float volume = runtime[0].mFloat;
                     runtime.pop();
 
-                    float pitch = *reinterpret_cast<float *> (&runtime[0]);
+                    Interpreter::Type_Float pitch = runtime[0].mFloat;
                     runtime.pop();
                         
                     context.getSoundManager().playSound3D (
@@ -291,10 +291,10 @@ namespace MWScript
                     MWScript::InterpreterContext& context
                         = static_cast<MWScript::InterpreterContext&> (runtime.getContext());
 
-                    std::string id = runtime.getStringLiteral (runtime[0]);
+                    std::string id = runtime.getStringLiteral (runtime[0].mInteger);
                     runtime.pop();                   
                     
-                    std::string sound = runtime.getStringLiteral (runtime[0]);
+                    std::string sound = runtime.getStringLiteral (runtime[0].mInteger);
                     runtime.pop();
                                             
                     context.getSoundManager().stopSound3D (
@@ -311,10 +311,10 @@ namespace MWScript
                     MWScript::InterpreterContext& context
                         = static_cast<MWScript::InterpreterContext&> (runtime.getContext());
 
-                    std::string id = runtime.getStringLiteral (runtime[0]);
+                    std::string id = runtime.getStringLiteral (runtime[0].mInteger);
                     runtime.pop();
                                             
-                    int index = runtime[0];
+                    int index = runtime[0].mInteger;
                     runtime.pop();
                         
                     runtime.push (context.getSoundManager().getSoundPlaying (
diff --git a/components/interpreter/controlopcodes.hpp b/components/interpreter/controlopcodes.hpp
index cf9185a69..534ccc4dd 100644
--- a/components/interpreter/controlopcodes.hpp
+++ b/components/interpreter/controlopcodes.hpp
@@ -24,7 +24,7 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                Type_Data data = runtime[0];
+                Type_Integer data = runtime[0].mInteger;
                 runtime.pop();
                 
                 if (data==0)
@@ -38,7 +38,7 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                Type_Data data = runtime[0];
+                Type_Integer data = runtime[0].mInteger;
                 runtime.pop();
                 
                 if (data!=0)
diff --git a/components/interpreter/genericopcodes.hpp b/components/interpreter/genericopcodes.hpp
index 116b586e4..44ef3fc6b 100644
--- a/components/interpreter/genericopcodes.hpp
+++ b/components/interpreter/genericopcodes.hpp
@@ -12,7 +12,7 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime, unsigned int arg0)
             {
-                runtime.push (arg0);
+                runtime.push (static_cast<Type_Integer> (arg0));
             }        
     };
     
@@ -22,9 +22,9 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                Type_Integer data = *reinterpret_cast<Type_Integer *> (&runtime[0]);
+                Type_Integer data = runtime[0].mInteger;
                 Type_Float floatValue = static_cast<Type_Float> (data);
-                runtime[0] = *reinterpret_cast<Type_Data *> (&floatValue);
+                runtime[0].mFloat = floatValue;
             }           
     };
     
@@ -34,9 +34,9 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                Type_Float data = *reinterpret_cast<Type_Float *> (&runtime[0]);
+                Type_Float data = runtime[0].mFloat;
                 Type_Integer integerValue = static_cast<Type_Integer> (data);
-                runtime[0] = *reinterpret_cast<Type_Data *> (&integerValue);
+                runtime[0].mInteger = integerValue;
             }           
     };    
     
@@ -46,9 +46,9 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                Type_Integer data = *reinterpret_cast<Type_Integer *> (&runtime[0]);
+                Type_Integer data = runtime[0].mInteger;
                 data = -data;
-                runtime[0] = *reinterpret_cast<Type_Data *> (&data);
+                runtime[0].mInteger = data;
             }           
     };    
     
@@ -58,9 +58,9 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                Type_Float data = *reinterpret_cast<Type_Float *> (&runtime[0]);
+                Type_Float data = runtime[0].mFloat;
                 data = -data;
-                runtime[0] = *reinterpret_cast<Type_Data *> (&data);
+                runtime[0].mFloat = data;
             }           
     };
     
@@ -70,9 +70,9 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                Type_Integer data = *reinterpret_cast<Type_Integer *> (&runtime[1]);
+                Type_Integer data = runtime[1].mInteger;
                 Type_Float floatValue = static_cast<Type_Float> (data);
-                runtime[1] = *reinterpret_cast<Type_Data *> (&floatValue);
+                runtime[1].mFloat = floatValue;
             }           
     };
     
@@ -82,9 +82,9 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                Type_Float data = *reinterpret_cast<Type_Float *> (&runtime[1]);
+                Type_Float data = runtime[1].mFloat;
                 Type_Integer integerValue = static_cast<Type_Integer> (data);
-                runtime[1] = *reinterpret_cast<Type_Data *> (&integerValue);
+                runtime[1].mInteger = integerValue;
             }           
     };            
 }
diff --git a/components/interpreter/localopcodes.hpp b/components/interpreter/localopcodes.hpp
index 427b4b574..ea62b7ad8 100644
--- a/components/interpreter/localopcodes.hpp
+++ b/components/interpreter/localopcodes.hpp
@@ -13,10 +13,10 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                Type_Data data = runtime[0];
-                int index = runtime[1];
+                Type_Integer data = runtime[0].mInteger;
+                int index = runtime[1].mInteger;
 
-                runtime.getContext().setLocalShort (index, *reinterpret_cast<int *> (&data));
+                runtime.getContext().setLocalShort (index, data);
 
                 runtime.pop();
                 runtime.pop();
@@ -29,10 +29,10 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                Type_Data data = runtime[0];
-                int index = runtime[1];
+                Type_Integer data = runtime[0].mInteger;
+                int index = runtime[1].mInteger;
 
-                runtime.getContext().setLocalLong (index, *reinterpret_cast<int *> (&data));
+                runtime.getContext().setLocalLong (index, data);
 
                 runtime.pop();
                 runtime.pop();
@@ -45,10 +45,10 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                Type_Data data = runtime[0];
-                int index = runtime[1];
+                Type_Float data = runtime[0].mFloat;
+                int index = runtime[1].mInteger;
 
-                runtime.getContext().setLocalFloat (index, *reinterpret_cast<float *> (&data));
+                runtime.getContext().setLocalFloat (index, data);
 
                 runtime.pop();
                 runtime.pop();
@@ -61,8 +61,8 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                int intValue = runtime.getIntegerLiteral (runtime[0]);
-                runtime[0] = intValue;
+                Type_Integer intValue = runtime.getIntegerLiteral (runtime[0].mInteger);
+                runtime[0].mInteger = intValue;
             }           
     };    
     
@@ -72,8 +72,8 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                float floatValue = runtime.getFloatLiteral (runtime[0]);
-                runtime[0] = *reinterpret_cast<Type_Data *> (&floatValue);
+                Type_Float floatValue = runtime.getFloatLiteral (runtime[0].mInteger);
+                runtime[0].mFloat = floatValue;
             }           
     };     
     
@@ -83,9 +83,9 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                int index = runtime[0];           
+                int index = runtime[0].mInteger;
                 int value = runtime.getContext().getLocalShort (index);
-                runtime[0] = *reinterpret_cast<Type_Data *> (&value);
+                runtime[0].mInteger = value;
             }           
     };    
 
@@ -95,9 +95,9 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                int index = runtime[0];           
+                int index = runtime[0].mInteger;  
                 int value = runtime.getContext().getLocalLong (index);
-                runtime[0] = *reinterpret_cast<Type_Data *> (&value);
+                runtime[0].mInteger = value;
             }           
     };    
 
@@ -107,9 +107,9 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                int index = runtime[0];           
+                int index = runtime[0].mInteger;
                 float value = runtime.getContext().getLocalFloat (index);
-                runtime[0] = *reinterpret_cast<Type_Data *> (&value);
+                runtime[0].mFloat = value;
             }           
     };    
     
@@ -119,12 +119,12 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                Type_Data data = runtime[0];
-                int index = runtime[1];
+                Type_Integer data = runtime[0].mInteger;
+                int index = runtime[1].mInteger;
 
                 std::string name = runtime.getStringLiteral (index);
 
-                runtime.getContext().setGlobalShort (name, *reinterpret_cast<int *> (&data));
+                runtime.getContext().setGlobalShort (name, data);
 
                 runtime.pop();
                 runtime.pop();
@@ -137,12 +137,12 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                Type_Data data = runtime[0];
-                int index = runtime[1];
+                Type_Integer data = runtime[0].mInteger;
+                int index = runtime[1].mInteger;
 
                 std::string name = runtime.getStringLiteral (index);
 
-                runtime.getContext().setGlobalLong (name, *reinterpret_cast<int *> (&data));
+                runtime.getContext().setGlobalLong (name, data);
 
                 runtime.pop();
                 runtime.pop();
@@ -155,12 +155,12 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                Type_Data data = runtime[0];
-                int index = runtime[1];
+                Type_Float data = runtime[0].mFloat;
+                int index = runtime[1].mInteger;
 
                 std::string name = runtime.getStringLiteral (index);
 
-                runtime.getContext().setGlobalFloat (name, *reinterpret_cast<float *> (&data));
+                runtime.getContext().setGlobalFloat (name, data);
 
                 runtime.pop();
                 runtime.pop();
@@ -173,10 +173,10 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                int index = runtime[0]; 
+                int index = runtime[0].mInteger; 
                 std::string name = runtime.getStringLiteral (index);
-                int value = runtime.getContext().getGlobalShort (name);
-                runtime[0] = *reinterpret_cast<Type_Data *> (&value);
+                Type_Integer value = runtime.getContext().getGlobalShort (name);
+                runtime[0].mInteger = value;
             }           
     };    
 
@@ -186,10 +186,10 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                int index = runtime[0];           
+                int index = runtime[0].mInteger;          
                 std::string name = runtime.getStringLiteral (index);
-                int value = runtime.getContext().getGlobalLong (name);
-                runtime[0] = *reinterpret_cast<Type_Data *> (&value);
+                Type_Integer value = runtime.getContext().getGlobalLong (name);
+                runtime[0].mInteger = value;
             }           
     };    
 
@@ -199,10 +199,10 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                int index = runtime[0];           
+                int index = runtime[0].mInteger;
                 std::string name = runtime.getStringLiteral (index);
-                float value = runtime.getContext().getGlobalFloat (name);
-                runtime[0] = *reinterpret_cast<Type_Data *> (&value);
+                Type_Float value = runtime.getContext().getGlobalFloat (name);
+                runtime[0].mFloat = value;
             }           
     };        
 }
diff --git a/components/interpreter/mathopcodes.hpp b/components/interpreter/mathopcodes.hpp
index d569a5470..14d5d98df 100644
--- a/components/interpreter/mathopcodes.hpp
+++ b/components/interpreter/mathopcodes.hpp
@@ -16,14 +16,11 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                T result =
-                    *reinterpret_cast<T *> (&runtime[1])
-                    + 
-                    *reinterpret_cast<T *> (&runtime[0]);
+                T result = getData<T> (runtime[1]) + getData<T> (runtime[0]);
                 
                 runtime.pop();
                 
-                runtime[0] = *reinterpret_cast<Type_Data *> (&result);
+                getData<T> (runtime[0]) = result;
             }           
     };
 
@@ -34,14 +31,11 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                T result =
-                    *reinterpret_cast<T *> (&runtime[1])
-                    - 
-                    *reinterpret_cast<T *> (&runtime[0]);
+                T result = getData<T> (runtime[1]) - getData<T> (runtime[0]);
                 
                 runtime.pop();
-                
-                runtime[0] = *reinterpret_cast<Type_Data *> (&result);
+
+                getData<T> (runtime[0]) = result;
             }           
     };
 
@@ -52,14 +46,11 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                T result =
-                    *reinterpret_cast<T *> (&runtime[1])
-                    * 
-                    *reinterpret_cast<T *> (&runtime[0]);
+                T result = getData<T> (runtime[1]) * getData<T> (runtime[0]);
                 
                 runtime.pop();
-                
-                runtime[0] = *reinterpret_cast<Type_Data *> (&result);
+
+                getData<T> (runtime[0]) = result;
             }           
     };
 
@@ -70,19 +61,16 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                T left = *reinterpret_cast<T *> (&runtime[0]);
+                T left = getData<T> (runtime[0]);
             
                 if (left==0)
                     throw std::runtime_error ("division by zero");
             
-                T result =
-                    *reinterpret_cast<T *> (&runtime[1])
-                    / 
-                    left;
+                T result = getData<T> (runtime[1]) / left;
                 
                 runtime.pop();
-                
-                runtime[0] = *reinterpret_cast<Type_Data *> (&result);
+
+                getData<T> (runtime[0]) = result;
             }           
     };
     
@@ -92,7 +80,7 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                Type_Float value = *reinterpret_cast<Type_Float *> (&runtime[0]);
+                Type_Float value = runtime[0].mFloat;
                 
                 if (value<0)
                     throw std::runtime_error (
@@ -100,7 +88,7 @@ namespace Interpreter
                 
                 value = std::sqrt (value);
                 
-                runtime[0] = *reinterpret_cast<Type_Data *> (&value);
+                runtime[0].mFloat = value;
             }           
     };    
     
@@ -111,13 +99,11 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                int result = C() (
-                    *reinterpret_cast<T *> (&runtime[1]),
-                    *reinterpret_cast<T *> (&runtime[0]));
+                int result = C() (getData<T> (runtime[1]), getData<T> (runtime[0]));
                 
                 runtime.pop();
                 
-                runtime[0] = *reinterpret_cast<Type_Data *> (&result);
+                runtime[0].mInteger = result;
             }           
     };    
 }
diff --git a/components/interpreter/miscopcodes.hpp b/components/interpreter/miscopcodes.hpp
index 852d2d154..8d05c58da 100644
--- a/components/interpreter/miscopcodes.hpp
+++ b/components/interpreter/miscopcodes.hpp
@@ -22,7 +22,7 @@ namespace Interpreter
                     throw std::logic_error ("message box buttons not implemented yet");
                 
                 // message    
-                int index = runtime[0];
+                int index = runtime[0].mInteger;
                 runtime.pop();
                 std::string message = runtime.getStringLiteral (index);
                 
@@ -44,13 +44,13 @@ namespace Interpreter
                             
                             if (c=='S' || c=='s')
                             {
-                                int index = runtime[0];
+                                int index = runtime[0].mInteger;
                                 runtime.pop();
                                 formattedMessage += runtime.getStringLiteral (index);
                             }
                             else if (c=='g' || c=='G')
                             {
-                                int value = *reinterpret_cast<const int *> (&runtime[0]);
+                                Type_Integer value = runtime[0].mInteger;
                                 runtime.pop();
                                 
                                 std::ostringstream out;
@@ -64,7 +64,7 @@ namespace Interpreter
                                     ++i;
                                 }
                             
-                                float value = *reinterpret_cast<const float *> (&runtime[0]);
+                                float value = runtime[0].mFloat;
                                 runtime.pop();
                                 
                                 std::ostringstream out;
@@ -107,7 +107,7 @@ namespace Interpreter
             {
                 double r = static_cast<double> (std::rand()) / RAND_MAX; // [0, 1)
                 
-                Type_Integer limit = *reinterpret_cast<Type_Integer *> (&runtime[0]);
+                Type_Integer limit = runtime[0].mInteger;
                 
                 if (limit<0)
                     throw std::runtime_error (
@@ -115,7 +115,7 @@ namespace Interpreter
                 
                 Type_Integer value = static_cast<Type_Integer> (r*limit); // [o, limit)
                 
-                runtime[0] = *reinterpret_cast<Type_Data *> (&value);
+                runtime[0].mInteger = value;
             }    
     };    
                 
@@ -125,9 +125,9 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                float duration = runtime.getContext().getSecondsPassed();
+                Type_Float duration = runtime.getContext().getSecondsPassed();
                 
-                runtime.push (*reinterpret_cast<Type_Data *> (&duration));
+                runtime.push (duration);
             }            
     };
     
@@ -167,7 +167,7 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                int index = runtime[0];
+                int index = runtime[0].mInteger;
                 runtime.pop();
                 std::string id = runtime.getStringLiteral (index);
             
@@ -181,7 +181,7 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                int index = runtime[0];
+                int index = runtime[0].mInteger;
                 runtime.pop();
                 std::string id = runtime.getStringLiteral (index);
             
@@ -195,7 +195,7 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                int index = runtime[0];
+                int index = runtime[0].mInteger;
                 runtime.pop();
                 std::string id = runtime.getStringLiteral (index);
             
diff --git a/components/interpreter/runtime.cpp b/components/interpreter/runtime.cpp
index 746be60d2..f3a3a905d 100644
--- a/components/interpreter/runtime.cpp
+++ b/components/interpreter/runtime.cpp
@@ -68,11 +68,25 @@ namespace Interpreter
         mPC = PC;
     }    
     
-    void Runtime::push (Type_Data data)
+    void Runtime::push (const Data& data)
     {
         mStack.push_back (data);
     }
     
+    void Runtime::push (Type_Integer value)
+    {
+        Data data;
+        data.mInteger = value;
+        push (data);
+    }
+    
+    void Runtime::push (Type_Float value)
+    {
+        Data data;
+        data.mFloat = value;
+        push (data);
+    }
+    
     void Runtime::pop()
     {
         if (mStack.empty())
@@ -81,7 +95,7 @@ namespace Interpreter
         mStack.resize (mStack.size()-1);
     }
     
-    Type_Data& Runtime::operator[] (int Index)
+    Data& Runtime::operator[] (int Index)
     {
         if (Index<0 || Index>=static_cast<int> (mStack.size()))
             throw std::runtime_error ("stack index out of range");
diff --git a/components/interpreter/runtime.hpp b/components/interpreter/runtime.hpp
index 73e90f68a..e9ba01041 100644
--- a/components/interpreter/runtime.hpp
+++ b/components/interpreter/runtime.hpp
@@ -18,7 +18,7 @@ namespace Interpreter
             const Type_Code *mCode;
             int mCodeSize;
             int mPC;
-            std::vector<Type_Data> mStack;
+            std::vector<Data> mStack;
             
         public:
         
@@ -42,13 +42,19 @@ namespace Interpreter
             void setPC (int PC);
             ///< set program counter.
             
-            void push (Type_Data data);
+            void push (const Data& data);
             ///< push data on stack
             
+            void push (Type_Integer value);
+            ///< push integer data on stack.
+            
+            void push (Type_Float value);
+            ///< push float data on stack.
+            
             void pop();
             ///< pop stack
             
-            Type_Data& operator[] (int Index);
+            Data& operator[] (int Index);
             ///< Access stack member, counted from the top.
             
             Context& getContext();
diff --git a/components/interpreter/scriptopcodes.hpp b/components/interpreter/scriptopcodes.hpp
index 84fd546fb..56502d510 100644
--- a/components/interpreter/scriptopcodes.hpp
+++ b/components/interpreter/scriptopcodes.hpp
@@ -13,8 +13,8 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                std::string name = runtime.getStringLiteral (runtime[0]);
-                runtime[0] = runtime.getContext().isScriptRunning (name);
+                std::string name = runtime.getStringLiteral (runtime[0].mInteger);
+                runtime[0].mInteger = runtime.getContext().isScriptRunning (name);
             }           
     };
 
@@ -24,7 +24,7 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                std::string name = runtime.getStringLiteral (runtime[0]);
+                std::string name = runtime.getStringLiteral (runtime[0].mInteger);
                 runtime.pop();
                 runtime.getContext().startScript (name);
             }           
@@ -36,7 +36,7 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                std::string name = runtime.getStringLiteral (runtime[0]);
+                std::string name = runtime.getStringLiteral (runtime[0].mInteger);
                 runtime.pop();
                 runtime.getContext().stopScript (name);
             }           
diff --git a/components/interpreter/spatialopcodes.hpp b/components/interpreter/spatialopcodes.hpp
index d897ff69d..e37df8116 100644
--- a/components/interpreter/spatialopcodes.hpp
+++ b/components/interpreter/spatialopcodes.hpp
@@ -12,11 +12,11 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                std::string name = runtime.getStringLiteral (runtime[0]);            
+                std::string name = runtime.getStringLiteral (runtime[0].mInteger);            
                 
-                float distance = runtime.getContext().getDistance (name);
+                Type_Float distance = runtime.getContext().getDistance (name);
                 
-                runtime[0] = *reinterpret_cast<Type_Data *> (&distance);
+                runtime[0].mFloat = distance;
             }            
     };
     
@@ -26,15 +26,15 @@ namespace Interpreter
         
             virtual void execute (Runtime& runtime)
             {
-                int index = runtime[0];
+                int index = runtime[0].mInteger;
                 runtime.pop();
                 std::string id = runtime.getStringLiteral (index);
                             
-                std::string name = runtime.getStringLiteral (runtime[0]);            
+                std::string name = runtime.getStringLiteral (runtime[0].mInteger);
                 
-                float distance = runtime.getContext().getDistance (name, id);
+                Type_Float distance = runtime.getContext().getDistance (name, id);
                 
-                runtime[0] = *reinterpret_cast<Type_Data *> (&distance);
+                runtime[0].mFloat = distance;
             }            
     };    
 }
diff --git a/components/interpreter/types.hpp b/components/interpreter/types.hpp
index 2747d1447..89529189f 100644
--- a/components/interpreter/types.hpp
+++ b/components/interpreter/types.hpp
@@ -1,6 +1,8 @@
 #ifndef INTERPRETER_TYPES_H_INCLUDED
 #define INTERPRETER_TYPES_H_INCLUDED
 
+#include <stdexcept>
+
 namespace Interpreter
 {
     typedef unsigned int Type_Code; // 32 bit
@@ -12,6 +14,30 @@ namespace Interpreter
     typedef int Type_Integer; // 32 bit
     
     typedef float Type_Float; // 32 bit
+    
+    union Data
+    {
+        Type_Integer mInteger;
+        Type_Float mFloat;
+    };
+    
+    template<typename T>
+    T& getData (Data& data)
+    {
+        throw std::runtime_error ("unsupported data type");
+    }
+    
+    template<>
+    inline Type_Integer& getData (Data& data)
+    {
+        return data.mInteger;
+    }
+    
+    template<>
+    inline Type_Float& getData (Data& data)
+    {
+        return data.mFloat;
+    }    
 }
 
 #endif