I wanted Diva chewing on her lip for an image, so I made a morph for that using magnets. Then I found it worked just as well for Dawn. Then I made a reverse version. Then I learned how to make an INJ pose. Then I failed to work out how to create a JCM and a REM pose, but hey, baby steps. I'll update it when I get those bits figured out. It's also only for Poser right at the moment. I'll update it for DS as well once I learn how to do that.
In case anyone else wants the morph, here it is. It's actually four morphs applied via the INJ pose, two for the Head and two for the Jaw, one each for each body part for Left and Right. You don't HAVE to use the Head pose, but it looks a teensy bit better with it. The pose does affect the lower teeth, but as you can't usually see those it didn't matter for me- just be aware of it if it might matter for you.