hello.need help desperately 
.am in the prosses of learning blender and i came to the chapter about texturing and UV mapping,so i need good tutorials on gimp for learning the basics and tutorials on making a realistic textured face skin with the mapping from blender so i can proceed with my learning.if anybody out there are kind to help me out,it will be nice. because am addicted to blender.i like it so much.its cool.and am trying my best to learn everything in it and gimp is part of it cuz wanna make realistic characters. i tried searching for tutorials,but there isn’t much out there with blender uv mapping included.
Great to hear that, Check out this tutorials, it will help you a lot, They are few years back but they still very useful.
or search for this:
Blender Video Tutorials - Neal Hirsig
This Tutorials are not 3d blender but will give you professional information.
Watch part 6 and seven
Hope you become a 3d blender master! Great Luck