In the Windows world, there is a program called (I think) Centurion that allows the desktop to reset to a default look (i.e., the program icons) so if a child accidentally deletes a shortcut, it will reappear when the computer restarts. Is there something like this for Mac? I run a computer lab in elementary school using MacBooks (10.5) and the students - especially the youngest ones - are forever dragging icons off the Dock, rearranging the desktop, etc. This would be a very helpful program for computer lab situations if you know of one, especially if it's FREE! Thanks!