This model was made with Blender.UVs are done with smart Uv on Blender.textured in Blender, i also give you the normal map for the skull and the jaws, if you want to remake the texture in other software.
I recommand to use the .blend file (I left the scenes lights with it but you can delete it)There is a multires modifier for better rendering.
*I didn't do photoshop on the render, that's what come out of my .Blend file *