[A.SSpike]

Используй loadClip.

var mcLoader:MovieClipLoader = new MovieClipLoader();
var listener:Object = new Object();
listener.onLoadProgress = function(target:MovieClip, bytesLoaded:Number, bytesTotal:Number):Void {

_путь.loadBar._xscale = int(BytesLoaded*100/BytesTotal);

if (bytesLoaded == bytesTotal) {
target_mc.container_mc._visible = true;
}
};
mcLoader.addListener(listener);
mcLoader.loadClip("картинка.jpg", target_mc.container_mc);