I applaud your efforts and conviction. Please continue to quit. You might gain a few pounds, but the benefits will far outweigh the consequences. You've no doubt heard all the preaching.
Do they have anything like a Silent Fence - you know, that thing for dogs to keep them in the yard. When a cigarette approaches your lips maybe you could get a shock...?
Whoever exalts himself will be humbled, whoever humbles himself will be exalted - Matthew 23:12