So i had windows xp sp3 on my mac and os x. Got windows 7 ult today so I decided I would upgrade. Turns out you can't upgrade, only replace. So I erased the entire FAT32 hard drive and planned on installing windows 7 in its place ( have everything backed up). It says I can't install windows 7 on a FAT32 hard drive. So I deleted the partition, and wanted to adjust my regular os x hard drive to be the entire hard drive, then have the boot camp assistant partition it. When I go to disk utility it tells me "Could not modify partition map because filesystem verification failed". Boot camp won't partition the hard drive unless it is one giant mac os x extended journaled partition. What gives! What I'd like to know is how to make my hard drive just the mac os x one then let the boot camp assistant take care of the rest. Thanks in advance guys.