[KPaul]

Для наглядности инкремент:

i=1;
function dub(clip:MovieClip) 
{
	var mc = clip.mc.duplicateMovieClip("dubl"+i,i+1);
	mc._y=clip.drag._y+100;
	mc._x=clip.drag._x+100;
	clip.onEnterFrame=function()
	{
	 //this["dubl"+i]._y=this.drag._y+100;
	 //this["dubl"+i]._x=this.drag._x+100;
              mc._x++;
	}
	i++;
}
dub(mov);
dub(movo);