I agree with the other cysters, it is rough the first week and complex carbs are ok. But combine the two, simply stick to a strict low carb diet then slowly bring the complex carbs in, that works well for me.
I also was a smoker, then now I know I am addicted to sugar! Grr

If you can quit smoking you can low carb! been there, done, both!!!!
Simple things, when you feel hungery, and a bit weak, milk, a glass will help, christyz taught me that!
I wish you well! It will be worth it!