Newest update of Romero's mod has No Special Zombies as it's own patch! Lovely. Seems it's not a story mode mod, just the DLC.

I'd like to do this as well. Undeadlabs forum is currently down. Any suggestions? I have never understood the need for mutant zombies. Most films only have normal zombies and that's what everyone is used to. Why change our perception of zombies?