Link in one movie clip able to change content in another?

I was wondering if someone would be able to tell me how to have inter-movie links. Here is my dillema, I have 2 movie clips, on with links and one with content. I need to keep them seperate but the one with content must be controled by the one with links. So all in all what do you do to click a link in on movie and make it affect a different one? Thanks :rolleyes:

If both movies are on the main timeline. Lets call them mc1 and mc2.

On Button in Mc2

on(release){
_root.mc1.gotoAndStop(4);
}

_root means the main timeline.