http://www.antropus.com/english/tutoolho1.htm here is a good tutorial anyway i suggest to only learn from it then try to find your own style and stick to it/improve it. beware though, some popular characters such as v2 has an unfriendly mapping for eyes (on a 2000x2000 HEAD map, lost in a small corner..so you either choose undetailed eyes, but a "small" file size, or you enlarge it to 4000x4000 and have detailed eye but to the cost of a huge texture) I rather like to work on characters who have separate map for eyes, or simply (when i will finish to understand the advices blackhearted IMed me) make a smartprop for eyes and mmap it as you like (seems to be the best method once it i done)