To be fair, infinite warfare is a good game until the part where you can select your next mission. Then it becomes just too damn slow paced.

mwr is just reskinned cod4, nothing more, nothing less. Dont expect any mods for it ever though.

Seems mwr files are packaged identically to cod:aw files, same magic number even. Might be worth a shot trying to extract those and getting some high-res textures for cod4.