So many questions. Let's see.
WiZeR, bezier.rb is a script that allows you to draw Bezier curves. You can find it here:
http://amazone.crai.archi.fr//Ruby/RUBY ... _Depot.htm
Put it in the Plugins folder under SketchUp and while you're at it, copy sketchup.rb from the Examples folder out into the Plugins folder.
There's a lot of other cool scripts there as well.
Steve, I'm using SU5 although I still have SU4 on my machine. I did the cabinet in SU5 though.
When you export your drawing, do it as an OBJ file under the 3D exports. Before clicking the Export button, click the Options button and check Triangulate all faces and Export texture maps. Uncheck Swap YZ coordinates and select your units (metres?)
Now click OK and then Export.
Open K and open your OBJ file. Click on Materials and right click on one of the boxes that represents a material. Click Build..., Select All and thenOK or whatever it says. I don't have the software on this machine so I'm doing this part from hazy memory.
You should get all of your materials showing now. The ones that are your lights can be edited under the Advanced (3rd) tab to make them emitters.
A quick render should give you the starting point.
Hope that helps. I'll see if I can make some notes of the settings I used for that cabinet and I'll make JPG of the entire SU model to give you an idea of how I got the results I did. It'll have to wait until this evening though.
dave