Markus Bekel has been kind enough to allow us to host his 5 part UV mapping tutorial for complete beginners.   It takes you through uv mapping a gun from start to finish and is highly descriptive with voiced guidance throughout.  He uses Ultimate Unwrap 3D in his tutorials which is a must for the modder of many many games.  So go check them out.  There are 5 parts, all in HQ up on The Viewscreen.

 If you wish to try and following his tutorials.  Here is the Ultimate Unwrap 3D software to download from where there is a demo.  Ultimate Unwrap 3d Download