Your rig sounds essentially identical to my first rig, on which I ran Poser 6 for some time with no real dramas to speak of.

You'll definitley get the old 'Out of Memory' message every now and then, but that's something practically every Poser user is used to seeing.

It's just a matter of figuring out how to shoe-horn your renders into your limited memory. Bucket size, texture size, no texture filtering etc. In fact, I still optimise my scenes before rendering, even though it's not completley necessary any more.

If we can hit that bullseye, the rest of the dominos will fall like a house of cards...checkmate!