Attached Link: http://blogs.nvidia.com/gelato/2008/05/nvidia-gelato-p.html

From NVIDIA's web site: *"As a freely downloadable product, NVIDIA will no longer be developing or supporting the Gelato software products."* Maybe not worth the effort.

If you still want to tinker with it, there's a RIB plugin for Gelato called ribelato. Poser can export RIB files.