a quick and easy way, yet still looks great.. is creating a normal map from a greyscale...
1. export your models skin#1
2. install ati's normal map plugin for photoshop (or is it nvidia?)
3. Desaturate it (take the color out)
4. open the normal map plug in and tweak usimng the preview..
You can also use the normal map translator, which takes an image and converts it to normal map, but you have no control...