jawaelectric2,
Have you tried using MovieClip(root)? i.e MovieClip(root).menu_mc ? You can specify which movieclip you need and use a loader to get the swf.
Something like -
var loadedSwf:MovieClip;
var ldr:Loader
var url:URLRequest = new URLRequest("dir/swfName.swf");
ldr.contentLoaderInfo.addEventListener( Event.COMPLETE, this.swfLoadedHandler );
function swfLoadedHandler(e:Event):void
{
Movieip(root).menu_mc.mc_info.addChild(loadedSwf);
}
Good Luck,
AreDubya