Modifying a Kirupa tutorial

Hi,

Can someone please modify this tutorial ( http://www.kirupa.com/developer/mx2004/transitions.htm) so that it does this:
one of the external swf's has a button in it that loads another external swf in a different area of the stage, so now there would be 2 external swf's displayed on stage. Then, when one of the main buttons is clicked, the exit animation of the 2nd swf is played, then the exit animation of the 1st swf is played, then the new external swf is loaded in the same spot that the 1st one was.

Thanks!