Ahhh. I named the files thinking (Stupidly) that you would be able to see them.
Far right - Right Leg + Left Thigh
2nd from right - Left Leg + Right thigh
Far left - All toro area
2nd from left - Hands and feet (I think)
As for the biceps and triceps, I honestly don't know. You can use them in any way you want. That's the beauty of it xD
For the triceps, i recommend far left.
For Biceps, I recommend either of the leg textures.