I've tried to play the Black Ops 1 maps that came with Zombie Chronicles with the mod and the game was crashing every time. I find out now that somehow the game was crashing by changing my weapons (next weapon/previous weapon). This is only happening only in the Black Ops 1/World at War maps. Other maps like Shadows of Evil, Der Eisendrache, Zetsubou No Shima, Gorod Krovi, Revelations and Origins doesn't show this problem.