The Expert:
Umm... it does use the sun position for the lighting... or at least it does for me. (but only on objects in the world, not view objects, i cant figure out how to get it to do that correctly.)

Try changing your sun_angle.pan and tilt in game while using the shader, you should see the highlights moving on models that use it.

Glad the art resources were usefull to people, I have some more stuff like that coming soon. A simple fur shader next, i think.

Tone