Wish I could help.  I've an old machine that used to crash but that turned out to be the machine and NOT a Windows 2000 or Poser 5 issue.  I'm using a Vista machine now to create animations and those are pretty long files, like I said above.  I'm also using Poser 6 ...

Seems like you have plenty of system resources.  I just don't know that much about Poser 7.  I reverted back to version 6 pretty early on.

Maybe Wolf can help;(.

Best Wishes,
-R