You can shrink any digital photo to 80x80 very easily. Several programs out there available free on the web can do it for you.
I am a Windows guy, and use XnView. It lets you view photos, do slide shows, and change your images in all sorts of ways. It's super-easy to use and free. It's a little over 3 megs though so it takes a while to download over dialup.
Once you get the program downloaded, just open a photo with it and go to "image->resize." It'll ask you how many pixels you want the image to be. That's it.
http://www.tucows.com/preview/290806.html