i see mod kits use certain 3d programs like max

[alf eats cats]

can cinema 4d be used? or does it have to be a program that can open /cas file ( or something like that) if not no biggie....i was just looking into modding this game into something zombie related......but i am just starting with modding.

[DisgruntledGoat]

You are going to need to use a program that can import the mesh files. There is only one converter out there for mesh files and it converts them into MS3D file format used with Milkshape. However there is a MS3D importer script that can be used with 3ds max and Gmax (free stripped down version of max). So your only choices with regards to modeling are Milkshape, 3ds max or Gmax.