I never extract to the poser folder always to desktop first then put them where i want. Only thing that needs to go into specific folders are the Geometries but as for cr2, pzs etc they can be in any folder in the relevent library folder. For example i have all my Vicky cr2s in a folder called Vicky and her clothes in Vicky Clothes. As long as you keep the filetypes in the right library ie cr2 in character, pz in Pose etc you should be okay