If your running Maxblaster for the MBR / overlay
I’m going to assume your Bios doesn’t support the drive you installed in the system.
When you installed XP on fat32 you didn’t modify the overlay.
If you reinstall the overlay and keep it Fat32 you should not have any hassles.
Unless your XP install overwrites it. This may in fact be the reason of the BSOD during xp install
The files you are showing as missing are the NT loader