OpenPLI -> backup
You'll need to re configure the image this will happen as your 800 reboots you'll need to respond to the on screen prompts.
As mentioned all settings from your old image will be erased.
Ferret
Well, it doesn't have to do this kind of thing anymore if you install "PLI-Autobackup" plug-in on the OpenPLI-unstable (Excepts, the first time on both OpenPLI-unstable and the plug-in itself).
However, a storage device attached to the box, such as HDD or USB stick is required to keep the backup.
BTW, another good thing in OpenPLI is, online upgrade is available but some times when any big changes done, the online upgrade may not work.
More info: Just google "OpenPLI" (posting a link is against the rule)
Good luck & Have fun.
Tony.