This looks promising:
http://ping.windowsdream.com/ping.html
Going to have to try this and see if I can store complete disk backups of our
Macs (which our Ghost doesn't seem to want to work for) so that I can fix
problems that the students create much faster than going back to the install
media. Run through the online documentation/tutorial and see what you think,
might be the best, easiest, and free choice to be made to permanently store a
complete backup.