One thing hit me after the edit time expired on post.

There are two P8 runtimes, one for content and one for the program files.

I don't remember the defaults off hand, as I chose names easier for me to remember, like "Poser8" & "Poser8content".

It's best to have these libraries in the content folder to avoid problems.  Not saying it won't work if elsewhere, depends on your search depth and other things