I can boot a GPARTED (see google) and format that drive. However this means the drive is formatted and nothing more. No files, no Windows, etc.
Are you sure you want that?
I've attempted to format c from c prompt within Vista - I was pretty sure this might not work - and it did not.
I've also attempted to boot laptop with Windows XP cd and erase, format and reinstall software there, I received an error that the hard disk was not found once the option was selected to install Windows XP. Very odd.