Help!... Need to unload movie

I am trying to figure out what as i need to unload my movie clip. Here is the AS i used:

annie.onPress = function() {
_root.createEmptyMovieClip(“container”, 1);
loadMovie(“annie.swf”, “container”);
container._x = 380;
container._y = 190;
};
aveQ.onPress = function() {
_root.createEmptyMovieClip(“container”, 1);
loadMovie(“aveQ.swf”, “container”);
container._x = 380;
container._y = 190;
};

Problem is I only want it to show in one scene and it is covering everything on the other scenes as well or “Pages” .
Need help fast am under the gun on this one!!!

thx,
Foolio

or alternatively you can:
-set the visibility to 0
-set the alpha to 0
-switch depth to put it under other objects (considering they are on the same layer)
-go to a blank frame of ‘container’ clip

out of curiosity - is it any more or less processor intensive to load and unload the same MC when buttons are pressed than it is to swap depths or make things visible/invisible? Is there a method that is preferred? Not per person but how it effects the computer.