This used to be a really simple task, but it's quite the ordeal in as3, but I figured it out:
View it Here
It seems like there should be a way easier way of doing this.
Issues this covers: load movie, tween class, enter frame, target paths, variables
oh by the way, you have to do targets like this now:
MovieClip(this.parent.parent.parent).loadNextMovie(); //tell main timeline to call loadNextMovie function from loaded movie's timeline