http://www.xpgamesaves.com/topic/35565-official-release-modded-zombies-online-w-usb-tutorial/#.UD2XkNaPXLw Would recommend doing this OFFLINE only.
It is a tut on how to do TU11 Black ops Zombies on jtag and if i told you exactly what it says, there would be no point in it being in premium.
No, if I were you I wouldn't be trying to go online with mods retail or Jtag, Unless you are trying to get a ban.