It's really hard to explain this but

There may be some examples of this somewhere. If anyone can just point me in the right direction, I’d appreciate it.

The tutorial on Kirupa explains how to load external swfs and transition between them:

Question: Say an external example1.swf loaded into a container as in the tutorial has a button within it which loads another external example2.swf. Is there anyway to transition out of example2.swf before example1.swf transitions out and plays another section?