Um.. you're trying to format the drive while windows is running, that's not gonna work. Anyway, to manage hard drives within XP click control panel->administrative tools->computer ...
So I'm letting my roommie lease my pc. I'm not going to be using it anymore, and I have an ntfs partition of 17 gigs and an ext2 partition of 10 gigs on the primary drive. He doesn't want to use linux ...