here's one method (as posted by me on April 10th 2001)
http://gofuckyourself.com/showthread...+and+thumbnail
This is a tutorial (of sorts) that I create for GFY. However, since than I have discovered a way to re-write gallery pages so that you can create galleries with your site logo, and return links to your home page.
I'll search for that one as well. I know I posted it here...