To wipe the drive, some ways include; boot a win98 startup disk, run fdisk
and delete all partition information found (as long as NTFS is primary). Or
boot the Windows XP CD-Rom and when you get to the point, delete the
existing NTFS and or other partitions found, then abort the install. Or use
a utility named delpart. Once removed you can partition and format the drive
as you wish. Boot the Win98 CD-Rom or restore CD-Rom to start your install.
ftp://ftp.microsoft.com/bussys/winnt/winnt-public/reskit/nt31/i386/reskit.exe