If you liked the "My Pictures Slideshow" screensaver in XP, it'll work in Windows 7 and Vista. Just go to "C>Windows>System32" in XP and grab the "ssmypics.scr" file and paste it into the same location in either Vista or Windows 7. It'll then show up in your screensaver list.

You get the same transition effects, picture shrink and random placement that worked in XP.

Ta-Daa!