When I posted this image I had only spent about an hour or so on the texture. I realized the cracks were not proper (just stress cracks in the bones from time and wear). Since this time the model and texture has been remapped and reworked greatly from this first posting with the aid of a diagrams similar to yours from Peck's "Atlas of Human Anatomy for the Artist" Some time when I finish it I will have re-post it again. Anyway... thanks, this should be a great help to others who are looking for accurate detailing for their skeleton.