I don't know why anyone would want to do that anyway.
Maybe you should read this and get a better idea of the difference between the two systems.
NTFS/FAT TABLE
http://www.ntfs.com/ntfs_vs_fat.htmNTFS/FAT INFO
http://www.ntfs.comNTFS systems run on optimised 4096 byte clusters.
FAT 32 is not supported on very large drive volumes and works better on small volumes anyway.
e.g. My C: drive is just 3·0Gb for ME
For XP it should be about 8·0Gb is the general advice, if you want to partition your disk-drive.
For an even better understanding of computer file systems read all there is to read on this web-site.
http://www.pcguide.com/ref/hdd/file/ntfs/index.htm