When you currently need just one clothes, one Pose or one attitude for your Poser scene I don't see the need to have scores of folders under Poser directory. I would prefer store them appart and grab them when needed. Poser is lighter this way. The problem is to find back the files when needed and to copy them to Poser (with accompanying files) but first to find them back. I'm working on the subject too but I'll probably fix the copy back one first.

Yarp - author of P3DO Organizer for Poser