Just off the top of my head... for the dual mode lights, try saving the file in 32-bit mode. This should save the main black/white image in the 24-bit area, and the alpha channel in the remaining 8-bit area.
Just save the same way as adding reflectace to the livery textures and see if it'll work. Those are very nice work I think, clean and realistic.
BTW, I've been flying the Kittyhawk 732 extensively this past week, and love it. I noticed the cabin lights are off as well when my landing lights are off but didn't know how to solve it. Also, the freeware PSPanels classic is great with this plane I think.
