Need help fixing the partition table
 

HI. I'm running a machine with 2 hard drives. I had previously installed Windows XP and SuSE 9.0 in the first HD. Everything was OK. Then I decided to try Fedora Core 3, and installed it in the second drive. When installing, Fedora overwrote SuSE's Grub, so I reinstalled it and configured it to boot Fedora besides win XP and SuSE. The problem is, after that I can't boot windows, so I decided to reinstall it, but the installation program hangs up after the message: "Detecting your hardware". I tried booting a Hiren's boot cd which has a lot of HD tools, but it hangs up after chosing "Boot Hiren's CD" in the first screen. I brought the HD to a friend's and he somehow managed to boot Hiren's boot cd (maybe it was another version) and formated the entire hard drive. I thought the problem would be solved, but it's still the same. I guess there's a problem with the partition table, since after that, I can install and run linux on this HD, but not Windows. Does anyone know about some way to fix the problem and install win xp again? (No matter if I have to lose all the information on this HD).
Thanks in advance.

Try, under any linux,
This will zero out both the MBR and the partition table.

In the command you posted, shall I substitute "/dev/HARDDRIVE" for "/dev/hda"? (/dev/hda is the wrong HD) Or should I execute it right as yoy say??
Thanks in advance.