Attached Link: http://www.renderosity.com/mod/forumpro/showthread.php?message_id=2542336&ebot_calc_page#message_2542336

Old thread on the subject. (link)

Series 4 teeth are much better. I think one nice secret to a good smile is the actual reveal.. Some smiles are pretty "toothy". You can unlock the uppers and drop them down,,, use the dials... Xrotation even.. Lots of room for improvement. Trick is to get the corners of the mouth back, too. I found lips pucker in (negative -0.100) or mouth "A" help here with the smile morphs. Otherwise they can look like they sat on something unfortunate...

the rest is in the matroom.  You kinda want a glass of milk