The geometry and textures can be in any folder. They need not even be in the Poser directory at all. You can put the whole batch in the same folder. The Poser Library files are restricted to the Libraries that match their extensions. If you have the textures applied and move copies to your common folder: Poser does not like it when you try to apply a texture that is the identical name, but in a second location. You must either use a different name, save the Library file with no textures and reopen and apply those textures from the new location, or text edit the Library file after you save it. You can put the geometry and the textures in the same folder with the Library file, and if the only copy of the texture is in this folder, Poser will find it. The geometry path must be precise. Poser does not look. If it is wrong, it punishes you.