Well, a few suggestions here.
1) FAT file systems suck, unless you are using it on a small device like a thumb drive, or a small HD (8 gigs or under).
2) You can always toss them on a thumb drive or a DVD and toss them in your DVD player that supports divx
3) If you have cross platforms (ie windows and Linux) file systems do not matter if networking is involved, because they do not locally access the file systems. They do it over SMB (samba) which does not require anything to match file system wise.
If you really want to use the large drive as fat, try Gparted live CD and boot from it and format your drive that way.