Update:  Saving dynamic hair groups into the CR2 file seems to cause Poser to write a new base .OBJ file in the Characters library to support the hair groups.  This is probably not a good idea.  I can't recommend saving this into the character.  Probably it's much safer to spawn a prop of the area you want to add hair to, and then save that to the Props library (if that will work).  FYI, thanks.

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