formatting XP....easy enough

if its not the root drive, use disk manager- control panel-administrative tools-computer management-disk management, format from there.
if it is the root drive then do ask techiechick said, and pop in your system restore disk, and boot from it, XP will format it.

windows XP can use fat32 or NTFS....it runs better on NTFS though.

ps..how the hell did this thread make it to 2 pages ? sheesh