Not a problem. 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 2000 CD-Rom or setup disks 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
I'm guessing the failed install (or other issue) was the result of an
upgrade. Upgrades almost always fail.