Facial Morphing Software/Techniques?

scraps asks: " I am assisting an evolutionary psychologist who is researching how symmetry and size of facial features affects how others perceive a person's personality. I am looking for is a way to increase and decrease the symmetry of faces (digital images, not the living flesh), as well as increase and decrease the size of facial features while maintaining a "normal-looking" face. In the days of yore, Gryphon's Morph software seemed to be the weapon of choice, but they seem to have slipped into obscurity. I am using Mac OS X 10.2, and have Photoshop 7.0. Any ideas would be most welcome."