heyas; nope, not with pre-poser 5. you can only have one level of sub-directories in each library. the good news is, you can change your pz2 file extention to lt2 or cm2 files (light or camera) and stick them in your light/camera libraries. er, which, theoretically, should be the least-used things and have plenty of room ;) in fact, my pose library has hit my tolerance limit, and i'm getting geared up to go clean that sucker out and organize it better. poser 5 can use different levels of sub-directories within the libraries. or, you could do the runtime-swapping deal in p4/ppp. but that rather depends on you knowing what poses you'll want before you start up poser. that method is basically creating multiple runtime structures on, say, cd, then swapping them into the real runtime directory before you start.