I'm an action script idiot. Transistions between SWF's

Fact is, I think this is where I should post. What I’m trying to do is this. I have a basic flash page with three images that are buttons. Should load an SWF into the background. The loaded SWF only consists of an image and text.

Well, I would love to have the loaded SWF fade in, then when a user clicks on a different button, the swf FADES OUT While the new SWF FADES in.

I think I remember some actionscripting that contol the alpha of a loaded swf, but I’m not sure. Any help?