Most people look at BMI lists and swear that there is no possible way that they will ever weigh somewhere in the target range. I think what I would try if I were you is to become a grazer. Grazing is a big problem for anyone trying to lose weight but in your case it might just help. If you're always eating something, those calories will start to add up! I would also try to get a lot of fat and other calorie dense foods into my diet. If you make a hamburger, make sure you put butter on it
Some of you may die, but that is a risk I'm willing to take.