I will tell you what one of the leading experts on alcoholism and drug addiction told me just before I went into medical detox when I mentioned maybe I should try quitting smoking at the same time. He told me to first deal with the greater of the 2 evils my drinking first. Once I was on solid footing with my sobriety then tackle the smoking. This doctor was very much for quitting smoking from what his staff had told me so I was a bit surprised when he told me this.
Well I quit smoking on my one year sober anniversary, it was almost as hard to quit as the drinking had been, the doctor was right, there was no way I could have quit both at the same time. I have been alcohol free for over 3 years and smoke free for over 2 years now.
I would suggest that if smoking is helping you deal with the craving right now then do it, but once you are SOLID in your sobriety then quit the smoking. That was my experience.