So I recently got the Call of Duty Ghosts textures/meshes for the dog Riley. Now I am really wanting to use those textures on either the dog JT from the Willow mod or the dog Bullet from 4 Legged Friends. I just have no idea on how to approach this though. Could I get some help on this?

I'm not an expert in this area but I do have some know how and I don't think it's as simple as replacing one texture with another in afraid my man :/ chances are, the mesh for the dogs in NV won't match up with the textures for the COD dog, so you'd have to replace the vanilla dog mesh with the COD dog mesh. I don't know how well that will work with the skeleton and whatnot because I've never dealt with creature modeling in NV. The way I would approach it would be to first see if a straight model swap would work in the geck, you never know, you might just get lucky. This will only work if the model is a .nif file and the textures are .dds, however, so you're probably going to have to download nifskope, GIMP and Blender to convert the meshes to something NV can recognise. I know that's some pretty bare bones help but I'm kind of short on time at the moment, if you have any questions post em here and I'll see what I can do to lend a hand in the morning

The files that I have are some files that Dragbody created. So I think they are made for New Vegas. I am pretty sure it says that all I have to do it implement them into the game.

Oh, okay that makes things a lot easier. Did the mod come with an .esp nof? :/ in any case, what are the file extensions on the files? If they're .nif and .dds were in luck

There is no esp. There are however the .nif and .dds files

Cool, I'll pm you from now on seeing as you've requested it, if anyone is coming along here in a few months time and cares how we got on just pm me as well