Movie layering

i am loading movies onto my website into an empty movie clip this way:

on (release) {
loadMovie (“Movie1.swf”, _root.emptyMC);
}

i want the movies to load on top of each other because of the fading effect i have on them.
My problem is that when i click on a button the previous movie goes away and then the new one begins to load.
I want the previous movie to stay until the new movie finishes loading.

Anyone know how to go about this?

Any help is appreciated greatly. thanks