OK good luck.

Also remember, the hit-color skin does not need to be as high detail as the real texture.
Say your real texture is 1024x1024, your hit-color skin can be 128x128 and it will get
"stretched" across the same UV mapping co-ordinates. It only need to have a
high enough resolution to make sure the right hit-colors are on the right body parts.
You can just let the colors bleed into the un-used space between body parts with no fear,
or just fill that unused space with the lowest hit-color value so everything is covered.