I ran Tiger and XP (FAT32) on my MacBook until recently, when I upgraded the Mac partition to Leopard. Afterwards, I decided to restore the drive, re-partition, and reinstall XP. All went well. However, upon restarting from Windows, my Leopard partition wouldn't load. It would try and try hard, but the loading screen never changed. I tried using disk utility to repair the partition, but found that it was unmounted. It won't mount, won't verify, and won't repair. After trying to load it normally again, it would load for a long while, then turn off. I deleted the Windows partition in my tinkering, but I can't restore the size of the Leopard partition. When booting up, holding option gives me the Mac HD icon, but I can't access it in anyway. When I try to reinstall OS X on the drive, I now have no target volumes available. Help?