Need tut about head texturing

Now I practice at head modeling - but join an difficult on making head texture (I make good uv map, but then don’t know what to do ((((()
So please give me link to any lesson where I may see how people draw head textures (I mead lips, ayelishes etc)
THanks

http://www.worldforge.org/project/newsletters/October2002/CreateHeadTexture

It requires photoshop…but its pretty easy to follow.