Transitions Between External SWFs

Hello I was looking this great tutorial of Transitions between external Swf
http://www.kirupa.com/developer/mx2004/transitions.htm

but i have a question: What happend if i have the buttons in a “MC” inside the main timeline and not in the main timeline like the tutorial?..

If i have the buttons inside of an MC with instance name: MENU… how will be the path, to link the buttons to the main timeline?

Please Help me :*(