easy way done easier. I'm not sure about the realism kit, but Hyperreal will give you a warning that will tell you what the brightest light in the scene was so pick a light, any light, apply the skin then if it complains pick the light it said to pick and reapply. It doesnt matter how many times you apply the script, it just changes number values in the nodes anyhow. Also you don't always have to pick the brightest and still get some interesting effects, and never pick a IBL light. The key is to experiment and have fun, you'll learn 600% more if you're having fun doing it.