Ну скажем загружаем свф модуль game.swf

Код AS3:
var ldr:Loader=new Loader();
ldr.contentLoaderInfo.addEventListener(Event.COMPLETE,swf_loaded);
ldr.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS,swf_loading);
ldr.load(new URLRequest('game.swf'));

Код AS3:
private function swf_loaded(e:Event):void{
var mc:MovieClip=e.target.content as MovieClip;
addChild(mc);
}
private function swf_loading(e:ProgressEvent):void{
trace(e.bytesLoaded/e.bytesTotal);
}