The whole trouble being that I have to ignore the old seams and create new ones.  I'm now getting 95% correct results in my tests, anyway.  I have ten texverts which aren't cooperating.  Eight of them have been tested to be on the edge between two tris, and associated with the source tri with the incorrect texverts.  Such a case is easy enough to fix, by finding the proper neighbor tri.  The other two are more puzzling, and that's what's taking me so long with this.  I've had to come up with some... interesting testing procedures to try to get a grip on what's happening with these.  I'm beginning to think that something along the lines of a smoothing correction to pull them into line might be best, but that may not be correct.  I really need to locate the proper tri for them so I can apply the weights.

Slow, slow, slow.  That last five percent, debugging and fiddling, is the drag of it.  So close, but not there yet, and all the easy answers are already exhausted....

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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.