Migel, I owe you an apology. A
big apology...
I'll get back to that in a moment.
I re-opened the UV Map for the un-armored soldier and found that either Blender doesn't have the capability of adding a new seam and splitting a mapped section, or if it does have such a function I can't find it or figure out how to do it, not without re-unwrapping the whole thing and having to manually place all the texture areas by hand all over again. (I wouldn't want you to have to start over.)
I was, however, able to expand the ends of the belt section so that the pouches in the back were much larger and easier to work with, I'm currently uploading a new zipped package with the changes.
The embarrassing part is that while looking through all the tools, I found some features in Blender to easily map out areas in nice and neat sections, with straight edges instead of crazy distorted angles everywhere. If I had found this feature earlier it would have made it a hell of a lot easier for you to paint over all the areas and make your job much easier. I used this feature on the ends of the belt where the pouches are, you can clearly see the difference in the attached screen shot, nice and neat squares, all even and everything.
So, I'm sorry I didn't do this before, making the whole UV map nice and neat like this, it would have meant a lot less work for you.
I'm going to re-do the other model's UV map, the armored one, with these tools, so that by the time you get to the other model with the armor it should be very quick and easy.
Again, I'm sorry I didn't do this before.
Edit: Here's the modified un-armored one, changed like how you wanted:
http://www.destructavator.com/92dl/s6_20.zip