Hmm.  It looks like Ockham's WalkThisWay.py, version 1, suffered from these same memory problems.  He suggests that the problem is a Poser memory leak, specifically with Poser 5.  WalkThisWay2 avoid the problem using heavy restructuring which seems to remove most of the collision or positioning comparison in WTW1.  So apparently no real solution was found for the problem, but it may be that this shows that the problem is indeed Poser.

Which may mean a standalone Python 2.5 script, at least for the comparison part of the process, would be the best solution.  Unless anyone wants to take the thought a step further by building some sort of external application or module in C++....  (No takers?  Alas....)  I'll see if this seems feasible.

cobaltdream - I think there could be some conflict of interest for PhilC about sharing secrets used by WW to assist in the creation of a freebie script.  I wouldn't go around spilling the secrets if I were him....  (And yet, I somehow liked the Poser world better before it was marketplace and profit motive driven....)  Again, alas.

JoePublic, that's the sort of success I've seen with V3 to V1.  Not bad, generally.  You say mouth geometries need cleanup... but what about ears?  How well are they faring?

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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.