Softimage Xsi: Toon Help!

I've somehow agreed to have a toon shader ready to render in three hours, and i have never used a toon shader before. How do you adjust the value that defines a line creation. Is it based on the smoothing angle, and if so, how do i adjust it.


Here is the mesh, the current render, and a photoshop interpretation of what im looking for... Any help would be greatly appreciated.


Thanks in advance