Turning page effect

I hope someone can help me. I want to make an animated icon with a couple of pics and I want a pic changing into the other pic to look like turning a page in a book. But I can't find a tut about how to do it anywhere. I googled it, tried good tutorials, looked through the animation archive here, but couldn't find anything. Does someone have a link to a tut how to do this? I use Photoshop 7.0 and CS and Image Ready 7.0.