allora, caricato il file principale, passi alla seconda scena e associa questo al movieClip:

codice:
onClipEvent(load){ 
     _root.stop();
     loadMovieNum("audio.swf",20);
     loadMovieNum("menu.swf",10);
} 
onClipEvent(enterFrame){
     car1 = _level20.getBytesLoaded();
     tot1 = _level20.getBytesTotal();
     car2 = _level10.getBytesLoaded();
     tot2 = _level10.getBytesTotal();
     if(car1>1024 && car1==tot1){
          carAudio = true;
     }
     if(car2>1024 && car2==tot2){
          carMenu = true;
     }
     if(carMenu && carAudio){
          _root.play();
     }
}