Yes. Run the XP disc on bootup and reformat that partition and then pop out the CD and reboot. Or...you can try this. Go to Control Panel, Administrative Tools, Computer Management, then Disk Management. See if the partition exists, then if its listed, right click and select Format. Once the partition has been wiped, XP will still show the boot loader to select which operating to load on system boot. You will have a choice for XP or 2000. To remove 2000 from the list so the computer automatically boots into XP, go to Control Panel, System, Advanced Tab, then "Startup and Recovery" click the settings box. This will load a new window, click the edit button, which will load the boot.ini. In there, delete the line with Windows 2000. It should only have this:
[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /fastdetect
My System:
http://amdgamingrig.dyndns.org