You can do it Ray!!!! You'll probably have a few cheats but that doesn't mean you can't go back to having quit. Try your best not to cheat though because it sucks you in again so fast if you're not really disciplined. It's hard, I know-it took me a few months of quitting before I REALLY quit. And now when I try to cheat, I don't enjoy it at all. It's icky and nasty and it smells terrible.
You can do it, you'll be sooo glad you did when you wake up and you can breathe in really deep breaths you haven't breathed in a very long time. It feels great.
And for a hint to help you through those cravings, do anything that makes you have to breathe in deeply. Getting yourself out of breath is the best thing, or get a bowl of steaming water and put your head under a towel and inhale the steam in deeply add some tea or anything minty (Eucalyptus) to the water to make it really awesome. This trick really works when you get that "swelled lung" feeling.