I like to totally reinstall everything from scratch every few months. It's a good excuse to cut down on the sheer amount of stuff. I also take all my Poser stuff, and reorganize all the zip files using a template of the Poser folder structure. Then I make "theme CD's" of the originals. (Mike, Vicky, etc.) Then I install the stuff from there. If you have Poser 4, you want to get two essential tools: 1.) PBooost ($20 in the Marketplace, and it will soon be available for Poser 5!), and CorrectReference. PBooost allows you to create banks to further organize your Poser stuff. I have a bank for Mike, Vicky, the Millennium kids, etc. CorrectReference (free!) will go through your Poser installation and fix any bad texture references. You would be surprised at how many items have bad texture references. Also, CorrectReference will fix any texture references when you decide to move stuff around.