You need to the assgnment in Lightscape. Its out put really looks stunning but there lots of manual labor involved defining lights. I suggest you get a a physics optics book. For really real results you also need to get the light fixtures, and bulbs manufacturers spec on candlepower . Since Lightscape deals only with single sided surfaces, you should not use any surface solids.
Entire objects are easier to select when they have their own individual colors or layers.
Beyond this, I know very little else about LightScape. Thanks for your suggestions, I should have the program by the end of the week to see how it works in person. You probably needn't worry about selecting objects as it is the materials that you will be working with when the model is imported into Ligghtscape. Therefore make sure in FormZ that each layer represents one material. In this way you can select the whole lot with a click of a mouse and apply appropriate material settings.