%$@#

I decided to load Windows 7 onto the second hard drive at work, to give it a fair chance and see if it would work for our developers. I also want to keep XP till I fully migrate.

1. Put in Windows 7 DVD and restarted
2. Installed a clean version of Professional, by formatting the second drive.
3. Set the boot default to XP and restarted.
4. Did some work in XP and restarted.

Presented with "an error occurred while attempting to read the boot configuration data" and an unbooting machine. Google says to run Windows Repair off the Vista disc, and I assume the same is true for 7. So I boot off the DVD, pick repair, and it tells me it found my problem and fixed it. Reboot, and my option to get into XP is gone.

Awesome...