Also, in a pinch, you can do the following steps:
1. Change the BIOS settings to either RAID or AHCI mode.
2. Boot off of your Windows XP disk
3. Do an F6 during the start of the setup and install the mass storage drivers
4. Don't do the recovery console, but after that screen you can do a repair installation. It works, however, I have not determined if there are any negative impacts from doing it this way.