In BO1 you can change map textures via the iw files, and in BO2 Redacted and Plutonium you can change them via an external images folder. Is this same thing possible in BO3? Even if it hasn't been done yet, is it possible that somebody could implement this function?

I'm just wondering if it's possible to change the zombies' moans in BO1. I've managed to extract and listen to them from common_zombie.ff by using Tom Crowley's Black Ops Sound Converter Tool, but I see no way to repack my changes to the files. Is this possible, and if so, how would I manage to do it?