Texturing tutorials?

Can anybody link me to a good texturing tutorial for the GIMP?I want to learn how to make human skin textures with dark parts and all.

http://www.mindbites.com/lesson/687-gimp-seamless-textures

http://blenderartists.org/forum/showthread.php?t=33041

http://blender-archi.tuxfamily.org/Create_a_seamless_tileable_texture

one of those should get you going in the right direction, there is also a way to save out the map as a file type and then open in gimp and paint right on it then re-load it into blender, tutorial is out there, those links were the first 3 under google search- (Blender gimp and seamless textures)