Extracted them with Lime, renamed bones (not sure if you need that) and just imported them with APE

Okay, how did you change the model of the Zombies to Templar Zombies?

You can find it on modme or with the search "wraith black ops 3 model export"

Sorry, I must sound stupid, where can I find wraith? I tried to do a google search and couldn't find it there

Well you can use wraith or another tool like the ones from tom crowley

Is there a tutorial that you can point me to? Or can you show me somehow?

What did you extract it from, and how? Sorry, I am new to mapping, and I need all the help I can get

I extracted it and imported it to radiant.

Zindea, how did you make that skybox?

yeah