You might also do this:
1) start Windows setup, and when it gets to showing the disk partitions, delete them all
2) press the F3 key twice to
exit Windows Setup after having deleted the partitions
3) take a snack break
4) start Windows Setup a second time and carry on. This two-step approach prevents you from ending up with a sto0pid screen in your boot-up process that offers two WinXP installations, one of which is a phantom.
Also, if you happen to be installing on an SATA drive, make sure there aren't any PATA (regular IDE) drives in the system, or any USB card readers/thumb drives either, because SATA will get bumped down to drive letter E: or something, and then your face will look like this --->

If your WinXP doesn't have Service Pack 2 onboard already, can I suggest that you pre-download
the full SP2 installer and burn it to CD, and follow the routine
here so you don't get a boatload of worms right off the bat. Good luck!
