Late last year I was having trouble with disk space. I was about to delete Poser from my HD. I wanted to prune the libraries but the job was just too big. Finding all the cr2 files, then the rsr, obj and any textures and props that belong to any given item takes far too long and seems like too much hard work.
When you delete an item from the library, it only deletes the reference to that item, most of the associated files remain, uselessly taking up resources.
Then I found the Pun program. Poser uninstaller. Awesome little freeware. Well, I'm raving a bit, but it saved deleting Poser and made cleaning out the libraries a breeze.
One small warning, check the listed associated files. Some characters do refer in their cr2 to obj that are essential to the operation of the base Poser figures, etc. So take a moment to read the list before hitting recycle.
Here's a link to the program. It's on a commercial site, but there are also some other freebies.
http://innuendosoftware.com/downloads.htm#Pun
If you all already knew about this, then, well I'll feel a little silly, but happy for my HD.