Believe it or not the dependence on nicotine only stays for approx 48 hours (of pure hell) then its the habit, the hardest bit is making sure you continue to take breaks from work, i used lollipops for this you look like a fool and it rots your teeth but it works don't suck, breath around them.
Say I don't smoke in stead of i gave up when someone offers you a fag, they'll get the hint and it reinforces your willpower.
Distraction works, the key is find a distraction which you focus on to beat the craving, two minute is usually ample, get a puzzle or something that you really want to do and enjoy doing it. next craving have another go etc etc etc. i felt fine after 3 weeks, then felt bad after 3 months and gave up for three years before seccumbing again ....
My thought go with you, and support it is hell, but worth it to get your taste and smell back.