Pro-tip: If you want to have access to the Eye and Hair Colors from the regular CC mod, but also want that fly ass outfit or just the make-up from the Goth CC Branch you can actually do both.
You just need to extract the Not-Goth's WWW folder on top of the Goth's WWW folder, pop it into the base game's WWW and bam, different hair colors, eyes, and the sleek black version of Karryn's uniform alongside the make-up are now at your fingertips.
Caveat of course is that once you change her hair off of the default Goth one you can't get the Goth one back.
Pretty sure with some dark magicks of coding you could manage to make it an option alongside the others however.
As for swapping between the base Skin to the Goth skin I dunno how easy or hard that would be, but iirc it gave everyone headaches trying to get it to not glitch-out or such.