Hey, would be glad to explain to you how the mod works. SO the mod takes variants into account. If you are playing TTW, you will still find some of the F04 ghouls wandering about. However, most of the ghouls you will encounter in FNV will have the default skin. Only some of the ghouls you encounter will have the F04 skin. Ghouls that are important NPCs will not have their skins changed to reflect those of F04, so Doctor Barrows, Raul, and Chiron will maintain their classic look. If you do not like this, you are able to change how many ghouls spawn with the skin via FNVEdit or you can re-path the textures so the ghouls you want show up on the types of enemies you routed the textures to. Hope this helps!