There is no "rollback" to Win2K. To replace WinXP with an earlier
OS, you'll have to boot from the appropriate boot disk, format the
hard drive, and install. There is no supported downgrade path or
technique.
Simply boot from the Win2K installation CD. You'll be offered the
opportunity to delete, create, and/or format the system partition as
part of the installation process. (You may need to re-arrange the
order of boot devices in the PC's BIOS to boot from the CD.)
--
Bruce Chambers
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