Simply put, this lights the model from all sides equaly. This is good for seeing if your model is the way you want it, with textures alining right and geometry is correct. If it's easy enough, I'll code it. Just give me some references and info on were to put the light and I might be able to do it. Thanks. I'll go look myself, right now.
my suggestion: vertex-paint your whole model light grey and press the button "VCol Light" The whole model should then be lighted everywhere you want and you have got intensity control.