http://www.the-tree-of-life.com/gogsrc.htm. Search "nicotine". In fact, there are procedures to expunge virtually all habits. Best of all, they are free.
NOTE: The procedure for clearing alcohol addiction is longer than all the other procedures COMBINED, including cocaine, opiates, etc.
NOTE 2: If the procedure makes you feel silly, remember it was developed by a $700/hr. psychologist that frequently lectures at Cambridge.