Ok, I figured it out. This is what I did.
1. I was originally using Joku files, but that didn't work, so I downloaded PrincessNicky's base nude textures.
2. Loaded my game, showed me in underwear with Kibelius armor.
3. Removed underwear and now nude.
4. Works for both wings and non wings version.
5. Must be wearing the Kibelius outfit and be using the base body textures from PrincessNicky's textures for it to work.
6. Removing Kibelius outfit just shows the regular armor or starter armor you are wearing.
Here:
EDIT: Oh, the invisible textures work too btw, just tried it.