All you have to do is run the Snarlygribbly script if the V4 materials show black. It will fix it. No manual tweaking required. Regarding eyes, if you need to change eye color, the only thing you need to change, once you applied Ghosthip2's eye materials is the Iris color map. I have several characters I use based on V4 and I don't even start without running those two scripts--they are part of my daily workflow (then again, I also saved out P12 compatible copies of those characters I use most often).