There are vast morphs available for the poser 3 faces, the female mostly, including left/right mouth settings. If you aquire poser 4, you can create new morph targets of your own, in the program itself. Otherwise you will have to purchase and familiarize yourself with a 3D modeling program, which you can use to modify the head geometry of the figure, and apply as a morph target. You may want to download the "advanced techniques manual" from metacreations.com, and decide if you are ready for that kind of work or not. Beware of the limitations of the Poser faces. The geometry does not support the dynamic behavior of facial muscles, such as providing more complex meshwork for areas which need more flexability. If you intend to demonstate the full range of subtlety in the human face, you are in for a lot of work.