I know enough to not get what I want very often :D I just wonder what effect the light nodes would have on the light in a scene by being plugged into the actual light instead of being plugged into objects, I have these strange ideas sometimes.

I just tried to trick poser into plugging the diffuse node into a light by plugging it into a simple color node on the background, then copying & pasting it into the light, what I got was the simple color node with it's output plugged into it's own input, Poser crashed to the desktop when I clicked the node but it's cured my curiosity as to what will happen. :D Poser can't do it hehehe

IBL lighting is the way to go, I never use the old setups now, Olivier over at RDNA has a lot of tips for using it, really good tips. If you can find his tutorial on how to make the maps for it (can't find the link right now) it'll show you exactly where to put everything to get any light you want.

Windows 7 64Bit
Poser Pro 2010 SR1