There's a python script in Poser for indirect lighting? I didn't knew that. Interesting thing though. I used once or twice a light set with global illumination, but as you've said, it slowed everything down a lot. 
Right now I'll keep on working with C6. So much to learn and I've just started with it. But I love to import the poser figures into C6, as they are the things that I use in my scenes usually (i.e. Jack ;o)
I'm sure I'll pop up here soon again with new questions.
~Sassy~