You have Poser 8 so this thread is ancient history. Using the Gather node is so last century. Don't bother.

Any object that produces color with all lights off glows on its own. There are many ways to do this, but the simplest is to set the Ambient_Value > 0 (preferably more than 1 - I often use 5) and put a color or nodes that produce color in Ambient_Color. Just make sure it isn't black, as it will glow black, which is the same as not glowing.

Then to pick up the glow elsewhere, enable IDL.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)