There are some good ideas here for dealing with cravings - they're written from the perspective of the alcoholic, but they work for any craving, in my experience.
http://www.soberrecovery.com/forums/...-cravings.html
The thing is - cravings pass - even when we don't smoke, they pass.
And although it's not pleasant, it's more discomfort than agony, yeah?
If you can get through without caving in, it will get easier next time and the next.
D