Triple booting GParted, Ophcrack XP, and Ophcrack Vista from USB drive
 

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Yeah dude, it's not even listing the entries for orphcrack!

Unetbootin is Very unreliable too bro.
I can make up a custom menu.c32 Menu system for booting any multidistro's.

does unetbootin menu appear as whiteish box?

Please post the isolinux.cfg's from each iso; gparted, and the orphcracks.
it's easy to turn them into a syslinux.cfg

also, unless your using windows, you should make the usb 1 ext3 partition with grub
and it'll run better.
if you need to swap files with linux, make a 2nd fat32 non-bootable partition.

I can also make a grub menu sytem with pictures or colored text too.

you should ditch Unetbootin though, it's like a broke volkswagon