*"The module didn't run at all under the tdmt.spanki.py so eliminated the first period and tried again and got the same result."
*My bad.  I gave you the wrong name!  Ack!  :-P  The file should be saved as tdmtSpanki.py, exactly as the file it replaces.  Sounds like you figured that out.

You would be able to split off parts of the mesh and combine the resulting datafiles, as long as vertex numbering remains the same.  Somehow that doesn't seem likely.  If the vertex numbering changes, you'd need to correct the tdmt correlation datafiles to reflect the vertex order of the original meshes, rather than the split ones.  This could be done, hypothetically.  I don't have a tool for it, offhand.

What meshes are you working with?  It sounds like this somehow reveals the limits of the script.  I'm puzzled and a bit worried....

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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.