I can answer the question in #5. The OBJ files with no RSR partners have never been called by a Poser Librsry file. There is a lot of extra junk in geometries, especially if you have been collecting free stuff. There have been props and characters provided that have the geometry in the Library file and also have an associated OBJ file that is redundant. (unless you use it as morph stock, and maybe not for this, if the Library file contains a geometry that was imported with Poser scale and position defaults.)