Call Of Duty: Black Ops Multiplayer help

hey guys, i got BlackOps Skidrow and i wonder is there a multiplayer crack?
i already did the IModLoader thing, but you cant make your own class(INGAME)
i want the CombatTraining Menu from the Official game,

lol you can make your own class
only in the script it's very easy

and no you can't from the original game if i am right