A question for P90X users...

So I was taking a look at the diet plan, and I realized that it will be next to impossible to follow it. I'm 18, I still live with my parents, I don't want to spend a bunch of extra money on extra food, and I'm not the best cook. Anyway, my question is, will I see good results if I don't follow the diet plan to the letter, or at least try to substitute for foods?