Loading external content to MC content box

does anyone know how to load external swfs into the an MC content box using movies with embedded buttons?

the problem i’m running into is this: i have animated buttons within movie clips. i also have a main_content MC in my scene into which i’m trying to load background images from another file. this other file has 3 frames, each with a different image.

i don’t know what the action script would be for a movie/button to load my external swf frames into the main_content MC.

could someone help?

thanks!