Target paths, help!

Hello!

I’m building a site by loading swf’s into empty movieclips, and i’m having a really hard time making them communicate with eachother!

I would like to be able to load an external movie into an empty mc on the main stage, and then by pressing a button inside the externally loaded swf, load a new one in another empty mc on the main stage. I need them both to be present at the main stage at once. I feel like i’ve tried everything (this._parent._parent, _root._root, _root._parent etc), any ideas or good tutorials to teach me about target paths?

Since i’m loading them dynamically there’s no way of getting assistance from flash in finding the right path…

Any help appreciated!