that's on a Napoleon! i have an Ultra Chef, one of their entry level lines.
http://www.napoleongrills.ca/Gourmet-gr ... 405RB.html
i just marinate for a few hours and preheat until the grill gets to 600F.
i also buy my chicken breast from a local butcher. comes from a local poultry farm and it's insanely juicy. so much so, it's almost impossible to dry out!