Poser needs to be able to write the temp files for dynamics simulations, so the need for Administrative privileges makes sense. Presumably you would have had the same trouble with cloth and hair sims as with Bullet. It's good to know that user settings are something to check, if Poser simulations aren't working.

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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.