How do you back up XP's unallocated space?

This product states that it does a disk image. So far, I’m not finding this to be the case.
Windows XP sets aside some 15 meg of unallocated space for some kind of file disk keeping. So far, I have not figured out how Arconis can back it up like it claims it will. If , diskkill(a free utility to that does a complete wipe of your HD) and Macaffe(never can remember how to spell their name) can figure out how to get at it, I see no reason why Arconis can’t get at it either.