lesbentley, thank you for trying it in Poser.

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The zip contains two DSA files, and I guess those are the D|S equivalent of magnets, but it is not a format that Poser understands. 

Yes, the 2 DSA files are for D|S.  It is not required for Poser or to use the cr2.  I made this for testing some new ideas and to fix the poke through in D|S.

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Say I have one JCM morph "MorpX" that reacts to xrot, and another "MorphZ" that reacts to zrot. Say I now want a third JCM morph "MorphXZ" that only reacts to a combination of xrot and zrot, but does not react to either xrot and zrot when only one of these rotations is used alone. Can this be done? I think it can, and I plan to test my idea on your Beach Volleyball Set.

This is what I want to know too.

I download the manual of Morphing Clothes, by Dimension3D and some of the samples.  It looks great.  I want to try to achieve the same without something like Morphing Clothes because I would like to improve my 3D graphics programming skill.  For example, the right side of the JCMs in the Beach Volleyball Set is generated by a simple program I wrote based on the left side with the symmetric map generated by code.  Then, I cut and paste to the cr2 file.
 
There are some nice articles at http://number-none.com/product/.

Sorry, I'm not a Poser user but I love to create contents for Poser or D|S.

Cage, I'm reading your code too.  I think the idea is the same as the conforming clothing.  You are transferring morph from one mesh to another similar but not identical mesh.  For some conforming clothing, where the mesh is close to the figure's mesh, your script should work as well.  If the same logic apply against the the conforming clothing object and body part with the deltas in the JCM, we can get the conforming clothing object as it is morphed at JCM value set to 1.  Then, we can get the deltas by using the same method I described in the post about the conforming clothing for Antonia.  The JCM can be done.  In theory, if the conforming clothing mesh has higher resolution than the figure or its vertices are aligned to match the figure, the result should be OK.  Otherwise, the chance of having poke through is higher.