My first tutorial.
I suck at explaining things, so bear with me.
Oh dear, this old shame is in the Kerkythea group. It's quite old and outdated, and I think when I first posted this years ago, I've progressed a fair bit. Still, I think the Kerky website and forums are a much better help than this.
Also, I recently found out that for some reason when generating pointlights in Sketchup, they don't flare in Kerky due to some odd clash in the geometry. In anycase, if your pointies don't work, just move them a wee bit to the direction away from your original geometry, it does wonders.