Код:

_root.createEmptyMovieClip('images',_root.getNextHighestDepth());
var loader:MovieClipLoader = new MovieClipLoader();
var loads:Object = new Object();
loads.onLoadComplete = function(target_mc:MovieClip)
{
  trace (target_mc.width);
  trace (target_mc.height);
}
loader.addListener(loads);
loader.loadClip('test.jpg',_root['images']);
stop();