You change the flags from "hidden" to "visible" or whatever you want. That's why Zirconia gave the tutorial link as well as the Zirconia version of the tut.
Anyhow, back to the original problem! I think I found the answer!
http://www.demusedsims.com/idolatryo...atomical2.html Black skin is caused by missing textures in the skintone.