I want to format my computer, but I have XP and am using NTFS... so I don't know how to format it.

I'm used to going into DOS and formatting, but of course I can't do that now, so what the hell do I do? I thought I could re-format the drive as part of the installation of XP, so I booted up from the CD, but that doesn't seem to be an option.

What can I dooooo?