SERIOUS WARNING: Reflex Engine can steal your ConsoleID, I should know because it's stolen my CID 3 times in past
There are GSC menus capable of some pretty crazy things in BO2 zombies as well but it puts your PS3 at really high-risk for cheat-detection and bans, especially if one is using CCAPI without actually attempting to disguise any of what they're doing.
Not sure because I haven't been much into online mods for almost 2 years now but there were only ever about 3 menus for the zombies section of BO2 and a ridiculous amount like 50 for the online MP, which is why I never liked multiplayer online for BO2 Only other zombies menu that I remeber having for that game was 'AZZA' I believe.
Paid-for Reflex Engine 3.0 is the only menu that will help you get into the really far rounds as it is the only SPRX menu that gives mods to see wherever the zombies are.