I believe, that if you want to go back to the \"out of the box\" condition, you can use the built in reset commands to restore to factory defaults. You need to power it off, open the battery cover, press and hold the reset button for several seconds, close the cover, and then while holding the OK button, press the on-off button. It\'ll bring up a menu and I think one of the options is to reset the unit. There\'s a section in the back of the manual on how to do this.
The regular backup, I think backs up /home.