The upper and lower jaws, as well as tongue parts, are separate actors in Antonia.  The mouth morphs could be ERC-linked to the lower jaw, to make it rotate, but in the current version the lower jaw needs to be rotated by hand.

It's actually a very sensible setup, IMO.  It makes things easier, not having internal head geometry confusing things sometimes.  Magnet morphs, for instance, no longer run the risk of deforming the teeth along with the cheeks or lips.  I don't recall whether the .cr2 holds zero deltas in morphs.  If it does, separate actors for teeth and tongue cuts down on useless zero delta listings, reducing filesize.  It makes it easier to access the internal geometries, too, for morphing purposes.

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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.