var FixedW:Number=myMovie.width;
var FixedH:Number=myMovie.height;
var loader:Loader=new Loader();
myMovie.addChild(loader);
loader.contentLoaderInfo.addEventListener(Event.COMPLETE,comp);
loader.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR,Err);
loader.load(new URLRequest("mySWF.swf"));
function Err(evt:IOErrorEvent):void
{
trace("Error!");
}
function comp(evt:Event):void
{
loader.width=FixedW;
loader.height=FixedH;
}