If anyone still need this. You can compile all your classes in anExternal SWF @runtime and load that external SWF dynamicaly from yourMain SWF. After you can instantiate objects that are compiled in theLoaded SWF (see the Class type in AS3 and getDefinitionByName("MyClass") where "MyClass" is can be a class defined in the exported swf.
You can have a PHP file that runs a serverside script that compiles an .AsFile into a SWF when it's called by your main SWF app.
I knowIt's a handful but it's possible. Hope it helps :).
-mihnea-reply by mihnescu