In order to get lights inside the buildings you have to use:
effect placement in the editor
choose lite and then the lite.fx
remeber to place it inside the building
i was using the "africa_village_03 #1" building as a try, and i got light in the all windows exept the 2 to the lower right when you view it from the front. Also did try to lower and raise the effect using the ctrl when moving the effect, but no lights in the above mentioned windows. My guess it that there is no defined room there. When you enter the building it seems the floor on the right side is 2nd floor and the left side is 1st floor.