Partition Nonsense

[Wind Owl]

I put windows XP on its own NTFS partition on my Macbook Pro and shrunk the OS X partition, so now each of them have about 20 GB, and there's about 180 GB of unpartitioned space on my internal hard drive.

Can someone please tell me a way, through OS X or through XP, how to create a FAT32 partition in that unallocated space? I've tried OS X's disk utility, Drive Genius (says it can't read the file structure, or something like that), windows' hard drive management utility (Computer > Manage), PartitionMagic, and MacDrive. Shouldn't this be a simple operation?

 

[Wind Owl]

... OK, so I just used PartedMagic to make a fat32 partition in that space... Unfortunately, the partition order is [mac partition],[fat32],[windows] and boot camp no longer knows where Windows is!

Is there a way to fix this without completely reinstalling Windows?