Need Help to access or attach a movieclip of externally loaded swf

Hi all,
I’m doing a flash site and it is now in it’s critical stage. I have a main movie where i have links to different different sections wich have been loaded usind loadMovie concept. Now i have one requiremnt to access to attach a movieclip from a externally loaded .swf . My problem also will be solved if i can access a purticular scene of a external swf or purticular frame( level) of the loaded .swf.

Note: I want to jump to a purticular frame of one externally loaded movie when i click on button in the _root movie.

Help me!