To change the uniforms that the zombies wear do the following:
In the editor:
- Open up the Ambient Zombies module.
- You'll notice at the bottom, there's a box marked Zombie Uniforms Override.
- In this box, you paste the uniform names and they'll be added to the zombies.
Note: You will also need to load the mod which you're taking the uniforms from.
Evil Organ has made an excellent video showing how it's done. He has also compiled a list of uniforms and their names for use in the editor. You can download it at the following Dropbox link.