The easiest way may be for you to install WindowsXP on a FAT32 type filesystem, as FC2 (and practically every other Linux distributions) has no problems reading and writing to this FS type.
If what you're trying to do is just to provide a means to share your data between XP and Linux, and not to provide a means to read/write the whole of your XP partition, the simplest solution would be to set up a separate FAT32 partition big enough to store all of your data. You would be able to read and write this partition quite happily from both XP and Linux, and wouldn't need to reinstall XP.
Cheers, Paul.
