Why has no one done a zombie mod?

[CTS]

Hehe, i am a huge fan of L4D and zombie mod for CoD:WW, i think it would be lots of fun actually...

5 man team - weapons, ammo and medpacks in crates after each "wave" - small map with some simple advancement mechanics ( to get new weapons need to move to a new building/area f.ex. ). Zombies with x3 movement speed... Something like that could be made for MoW.

It will take a long time to make for someone like me alone though... It sounds pretty simple, but there is allways something tricky that stands in the way, he he. But the idea is lots of fun imo.

I have a vacation soon, i guess i will use few days to try.