Install froze, winXP bootcamp is gone

I recently purchased Parallels 5. I have Windows XP installed on boot camp. When I tried to install parallels, it went for about 5 minutes then got stuck on step 1 of 4 in the configuration. Hung there for about 2 hours, so forced quite. Now my windows XP partition is screwed up. Can't boot into XP, can't even see the boot camp partition any more. Is there anyway to get it back or do I have to somehow delete the partition and do a clean install.