Loading an external swf! Plz help!

Hi folks!
Wjat I wanna do is a website which when a button is pressed an external swf file is load in. Thats piece of cake for me too. The problem begins when I want the external swf which has a preloader and this is loading in stops at a frame. Thats ok too. But what I want that when the next button is pressed first the external swf outro animation is played and only later the nwxt external swf loads in.
I need an example (fla) if its possibel
Thx. Vassgabor