As I understand it, you don't actually need either of the .rsr's when installing something for Poser. The large one is apparently a binary file that Poser creates as a point of reference. It hangs out in the Geometries folder with the base .obj's, but I've read that there is more encoded in the large .rsr than just the .obj information. Poser will generate a large .rsr if one does not exist already. The small .rsr is the thumbnail image for the Libraries pallette. Without it, you get the "shruggy guy". Re-adding a figure to the Library will create a new small .rsr. How do you create the .zip's with the download paths preset? That would be a useful tutorial in itself. I would certainly do that with my stuff, if I knew how.

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Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.