Hey I finally got the ophcrack to work...its so simple its silly.
Its not the cleanest/smallest setup but it works.
First, setup your usb with grub4dos (look up how to do this)
Second, copy the whole iso to the USB
Third, burn a cd/mount the iso image which is still on your computer, extract the "TABLES" folder and "md5sum" to the root of your USB (these have to be in the root in order for the program to find the tables.)
The menu.lst code is as follows:
title OphCrack 2.3.1
map (hd0,0)/ophcrack-vista-livecd.iso (hd32) <----or whatever the iso is named
map --hook
chainloader (hd32)
This mounts the image, boots the disk, and then the program searches the root for the Tables file (this gets rid of that annoying "no tables found" error on startup.
I'm trying to set it up without the iso and im sure i can...im just a little lazy...so for all you other lazy people that just want oph on you usb and are sick of trying...well...try this setup.