FF7 runs ok on some systems under XP, and it crashes on others. It always crashes, no matter what, on the Chocobo races, though. You'll probably want to put Win98 on some small, out of the way partition to play through the races. (Either that or use some one elses comp. I think I'm gonna make both my partitions NTFS when I get my new hard drive, and just play through the Chocobo races on my brothers comp. He has Win95 OSR2.)
As far as that WinXP Corporate . . . is that WinXP professional, or is that some special version of WinXP that you have to have a site lisence for?