private var loader:Loader = new Loader();                        

private function init():void {

  var request:URLRequest = new URLRequest(swfUrl);

  loader.contentLoaderInfo.addEventListener(Event.COMPLETE, completeHandler);        

  loader.load(request);

}

 

private function completeHandler(event:Event):void {

  swfClip = loader.content as MovieClip;

}