You have 2 options use the face shaping morphs (easiest) or use magnets (Hardest) I recomend using the face shaping morphs, face flat, nose long, etc. Magnets allow you to do more exact things but to shape the head propely you need about 8-12 magnets to shape the main aspects of the head. And it takes a bit to get use to using them. If you have poser 5 or 6 you can load just the shaping morphs for the head, no expressions and then use the Morp Puddy tool. To shape just click and drag, you don't even need to know what morphs you are using just pull and push with the mouse the software will figure out what morphs would apply to your actions. It is my favorite method. I even went as far to create a V2 head with just the shaping morphs so it could be used this way, using P5's remove morph method.