load movies into levels

[dommega]

How do I load a movie into a movieclip that is in a level? Everytime I try to load if fails.
Ex. _level3.loadMovie("movie1.swf", "subclip");

If I Load a movie and then unLoad it, does it still remain in the cache, so if I load that same movie the preloader does not have to start up again?

My goal is to park the movie into the subclip with a stop() frame and then load another into it, without having to use the preloader again.
Please help!

Thanks, Dommega

[Jesse]

loadMovie("file.swf","_level3.tagreMC");