Keep in mind that IF you set new EXTRA Runtimes as part of the PREFERRED STATE (as opposed to FACTORY STATE), Poser 5/6 will look for those Runtimes every time you start it up. And depending on the size of your EXTRA Runtimes, that can take a long long time. With P5/6 its also possible to maintain EXTRA Runtimes as small as one character. Its a speedier process if you want to just deal with one character/prop/scene without waiting for 700 other items to load. But it will add the missing Library folders if necessary. Just a consideration.