i will say it, as I understand, and it may not be absolutely correct... 1. Skeleton A Skeleton is the base, where you "attach" animation on. It also is essential, how ragdolling (how the body reacts on e.g. impacts or how it falls). 2. Body Mods like CBBE and UNP These Are Bodymodells, containing meshes and textures, building and moddeling frame and shape of the body of PC and NPCs. 3.Body textures Ok, the name says all...it's the "skin" of characters. But I think, your problem might be more simple but essential to solve... Do you use Tes5edit? If "no" you simply HAVE TO get used to it, if you want to mod decently. In the meantime, try to reset the archive invalidiation with NMM ( the tool dropdownmenu) after installing your mods. Quite sure it exists also in MO. But since I don't use it... Hope this helps. (Sorry, if there's something not clear. English is not my native language)