I've tried putting in terminal from MW2 by file>open map, and I've also tried right clicking>misc>prefab, but I either have to abort the error, or radiant stops working. I'm completely unfamiliar with zombie modding, so if I sound stupid, I apologize.

What are you putting in ._.?
i.e. the file

I believe he's trying to put in the prefab Andy Whelan posted.

(Image removed from quote.)

That's the one, but it's missing texture files.
Is there a way to actually import the map with all of the textures mapped?

That's the one, but it's missing texture files.
Is there a way to actually import the map with all of the textures mapped?

That's not a thing.
But I uploaded all the textures for you. You're still gonna have to manually apply them, which, I couldn't be asked to do even if I was paid for it, but it's one step closer for you.

EDIT: I actually don't know if I'm allowed to post this. Just PM me. 
EDIT Again: Apparently 2 people already downloaded it for the 30 seconds it was posted, fucking savages. I'm going to assume you got it, if not, feel free to PM me.

I believe he's trying to put in the prefab Andy Whelan posted.

(Image removed from quote.)

Is that a gmod source terminal map converted with johndoe's tools? :p