Been a while since my last post... Testing Blender 2.66, dDo, nDo and Substance Designer. Here's Unity asset I made with the help of dDo. Original TGA's intact, diff, nor, spec, height and reflection map.
ps. Check out Death to the Armatures. After seeing what's killing Armatures, I made a quick armature with empties to get the constraints worked out, then used the same constraints in a proper bone rig. Huge time saver for complex constraints.