In my case, I want to replace the current models and textures for only armor items, so that I could make my character look cooler. Note that I am aware that appearance mods for online games (if allowed) would be displayed only for people who installs this kind of thing.
Thing is, I've been searching and all I found are appareantly web docs displaying "mods" (I believe those are more like stats tables), and not the actual type of mod I am looking for (texture/model replacements to inject).
Does the game allow to replace models and textures?