I'm no expert, but I was just reading tonight and on p.157 in my book (carbohydrate addict's lifespan program) it says that you can have coffee instead of breakfast, and once with your reward meal. It suggests that caffeine might induce cravings (decaffeinated is suggested).

If you're anything like me, you can't live without your coffee. I used to drink around eight cups a day, which now are replaced with water. The caffeine withdrawl wasn't so bad, and the upside is that I enjoy it that much more when I do drink it. (..and I don't get as many headaches as when I used to frequently drink it and was unable to get a cup on occasion.)

Just thought I would throw in my two cents!
Congrats on the fifteen pounds you've lost!

Love and laughter,
BabyGirl.