It's been difficult to work on the vacuum tubes and the grate since I dunno how to use transparent textures, etc. However, I still spent all night working on the Pip-Boy 2500 skin, here are the results so far:
http://img717.imageshack.us/f/70590887.jpg/
http://img51.imageshack.us/i/68577788.jpg/
http://img40.imageshack.us/i/24444904.jpg/
Everything was made from scratch.

Tell me what you guys think of the skin so far! And perhaps give me some suggestions on how to improve it and what I should replace the vacuum tube compartment with if it doesn't work out.