Attached Link: http://www.keindesign.de/stefan/poser/firefaq.html

One ther comment I would add. although you have 1 gig RAM, I wonder whether a bucket size of 128 is maybe a bit too high? I have 768 Megs RAM, and (whils't I don't pretend to understand the intracacies of bucket size) I certainly can tell you that I started (for the first time) to experience render problems in P5 when I experimented with increeasing my bucket size to 64 (Poser didn't freeze but just stopped half-way as you describe) Maybe you already know, but there's a great FAQ on Firefly at the above link, and if you follow Stefan's "my guide through firefly" link you can read his comments on bucket size.