That's pretty much what I did, rebuilt the scene item by item and rendered. I found the problem and chopped the problem references out of the cr2 in a text editor. I figured I really couldn't break it too much and could always copy a fresh copy of the cr2 back over. Renders now post-hacking so I guess I'm good to go.

It would be nice if Poser kept an error log for things like that, though.