Thank you! Though we have about a million Disney desktop pics, some small enough to be centered and some large enough to fill the screen, so they're in different folders. On the Mac you can have the system randomly select them (OS 9 does it when you start the machine; OS X does it as often as you want, so every 15 minutes it's a new desktop). We use our old trip pics, pics from the net as well. Right now the cub is using Disney Christmas pics we've accumulated from the web. But more is good too! :)
www.suitedisney.com has a lot of them! Literally hundreds. :)
David