I worked out how to make a line adjustment mod that adds ambiguous hair/skin colors, and which races need it. However, given how much work sexiestmanalive has put into naming portraits already, i'm going to stop working on it as of now.
I'm really glad you are working together :)
With your weighted system combined with the option to choose the weight each body part holds, it sounds like every portrait will now have a chance to be chosen. Thank you.