I can't find a clear example of the code needed for this:

I have a base movie. Into the base movie, I have loaded (on layer2) a second movie containing a row of buttons. I want these buttons to control the loading of additional movies into the base movie (on layer 1) so that, among other things, the animation behind the buttons can change while the buttons stay the same. The additional movies each contain heavy pixel images, so I need them to exist as seperate .swf files for download purposes.

I've seen lots of code for controlling movie clips from movie clips, but not this. I can't seem to get the syntax right. Help!!!