Should map it like that, let me search a tutoriall that helped me out back in the day.
Didnt map it perfectly btw just hope it will help you understand how torihead works.
Edit: mo.st older and more toward head mapping focussed tutorials have lost their pictures which is a shame : /
Found this one of Pate the most usefull one I could find in the tutoriall index.
http://forum.toribash.com/showthread.php?t=226357