Sound and Structure of Flash Movie

What is the best way to structure this flash movie?

There are 10 large (more than 2 MB) content swf’s, a menu.swf, and control.swf with buttons and a music loop. Within each content.swf, I load a voice-over sound object.

I had planned on using loadMovieNum from the menu timeline to load the first content swf into _level1, and the control.swf into _level2. But that doesn’t work because I don’t hear any audio (voice-over sound object) from the movie on _level1.

I could just load the control.swf from each content movie and use loadMovie, but then my music loop cuts in and out at each loadMovie command.

HOW HOW HOW do I do this???