1.Go to Create, EP Curve Tool. Note that curve created by EP Curve Tool will pass through every point you draw. Press Enter to confirm when done.

2.In side view window, draw 2 separate curve as shown. Select second curve, press F8 to switch to Components selection mode if it is in Objects selection mode. Hold down RMB to invoke hotbox and select Edit point. After select curve's Edit Point, press w to activate move tool then pulls points along X-axis. Remember not to edit the first point near the nose. (Figure 4)

(Figure 4)

3.Now, I will rebuild the curve that I'd drawn to uniform number of spans. First is to ensure that uniform count of spans will form better surface. Secondly is to reduce spans count of surface, since I don't want to have so many points to push and pull around. Do not worry about the detail part, it can always been done by inserting isoparm to the surface. Press F3 to toggle to Modeling menu. Select curves that have been created. Go to Edit Curve, Rebuild Curve, options. Key in 10 for Number of Spans. Click Rebuild. Rebuild next curve too.

4.From Status Line select Snap to Curve. (Figure 5)

(Figure 5)

5. With the snap to curve activated, then select EP Curve Tool. Hold down LMB along first curve, you will notice that the first EP point is snapping on the curve. Snap the end point to second curve then press enter. Create another curve at both curve ends. I edit the last curve but leave third curve in the origin x-axis. Then I rebuild these 2 curves to 4 spans curve. (Figure 6)

(Figure 6)

6.Turn off grid from Display, Grid. Now go to Surfaces, Birail-2 select 2 profile curves and then select 2 rail curves.

7.After surface is formed, press 5 to turn on smooth shade, then press 3 to display highest smoothness. Make sure you are in Components selection mode (Press F8 to switch), hold down RMB to select Hull, and again select Control Vertex from hot box. Keep pulling CV, using direction arrow to toggle point to point until you get something similar to the picture shown. (Figure 7) When I feel I need more CV to control certain part, just click on RMB, from the hotbox select isoparm. Click on any isoparm and drag it to the area that you would like to add in more detail, then go to Edit Surface, Insert Isoparm. After you have satisfy of what you have done, then select the surface, go to Edit, Delete by Type, History to delete construction history.

(Figure 7)

8. Now I will model the jaw using the same method as above to create 4 curves, but only curve marked in red will be edited (pull the CV along X-axis). (Figure 8)

(Figure 8)

Rebuild curves, Birail-2 to form surface and then delete the history of the surface. Let's see what we have now. (Figure 9)

(Figure 9)

9. Select both head and jaw, go to Edit, Duplicate, options set the first Scale input field to -1, Number of Copies to 1, Geometry Type to Copy. Then press Duplicate button.

10. Now we will start stitching the surface to create seamless model. Select both head surfaces, go to Edit Surfaces, Stitch, Global Stitch, options. Set the following setting and press Global Stitch. (Figure 10)

(Figure 10)

If there are gab between surfaces, just play around with difference Max Separation value. The jaw surface was stitched with same method. With Global Stitch, there is no need to select both surfaces isoparm and stitch edges. It help to save time when you have a lot of surfaces to stitch!