Missed my edit cutoff.  :sad:

The attached script worked in my quick test, to bake the dynamics into a dynamic hair prop.  It should also work to bake deformations into any other actor.

The script works on the currently selected actor, and will embed a geomCustom reference into that actor.  The script isn't compensating for parenting when it handles worldvertex positions, so it will work best if the skull cap to which the hair prop is attached is in its default position.

The script can also be used to bake a morphed shape into a skullcap if, for instance, you've had to shape the skullcap for a character morph which affects the scalp.  In such a case, I've found that the guide hairs still want to appear at the un-morphed locations of the skull cap vertices, in which case baking the morphs into the cap can be useful.

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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.