Addictorator

So, new to the forums. Back to Skyrim (and Nexus) after a pretty long time XD So yeah, I've been using Cerwiden, and loving her SMARTcast and overall configurable party mechanics so far. But I don't quite like her appearance, so I want to switch it with that of another follower mod's (both body and face meshes and textures, but I'm fine with even just the face if switching the body is harder). This probably sounds very ignorant. I did some googling before this and all I saw was something about nix files or something. Cerwiden came with an optional appearance customizer, but that was only for face meshes I believe, and files in the format .npc, which I am totally unfamiliar with. The attached guide came with instructions to export head mesh from a player character in Skyrim. However, what I wish to do is replace it, along with body meshes/textures from another companion that comes with its own body made via bodyslide, as well as the face. Help in any form, ranging from a link, what to look for, or instructions, would be much appreciated :D

Hey guys. New to the forums so yeah XD How can I replace a follower mod's face/body meshes and textures with that of another follower mod's? I have CK but n00b.