What code must I add to the .lt2 so that it REPLACES lights and not merely adds to them? Actually, and correct me if I'm wrong, I think the problem is that some light sets don't remove extraneous lights. They will replace the lights, but will not remove any. How do i modify a light set so that it is the sum total of the lights in my scene? No left over lights from previous settings? Anyone know?

If you are using ProPack, there are some Python scripts (available in the Free section at Renderosity) that will do what you want. Otherwise, I don't know of any automated way of removing the unwanted lights. Hope this helps, Ericroy