If You All Want To Get It Working On A Boot To Iso Here Add Iso To Your USB And Add This To Menu.lst
title OphCrack 2.3.1 (Windows Password Cracker)
find --set-root /ophcrack-vista-livecd-2.3.1.iso
map /ophcrack-vista-livecd-2.3.1.iso (0xff)
map --hook
root (0xff)
kernel /boot/bzImage rw root=/dev/null vga=normal lang=C kmap=us screen=1024x768x16 autologin
initrd /boot/rootfs.gz