Here are a few examples that use the Loader class to load other SWFs into a main SWF. Here I planned each of the loaded SWFs around it’s own Document class. So, the Actionscript that runs each movie is contained in a document class for that SWF. This method seemed to work pretty well. The loaded movies in this don’t really do anything. But, they each contain something happening going on with Actionscript, which is stored in the Document Class for each SWF.