I have a mac os x 10.5.8 (yes, that is very very old.) and today, when trying to fix a problem related to the screensaver and backgrounds thing, I accidentally deleted the whole Background and Screensavers folder. Permanently. I tried it on different accounts, actually re-installed the whole preferences application (twice), and I do not have a back up or the setup disc. What can I do? Is there a file I can download for just the Background and Screensavers folder? Thank all of you wonderful mac-people out there!