Awhile ago I tried installing XP onto my Macbook via Bootcamp, and I allotted XP to use 18gb of my HDD. Then, while Bootcamp was partitioning, everything froze up, and I had to reboot. So, I reboot, and when I log in, I lost the 18gb. Disk Utility shows no partitions, and I can't do anything in there to fix it to my knowledge. Is there anything I can do to fix it, short of backing everything up and reformatting / reinstalling?