Have you tried using electronic cigarettes? I smoked for over 18 years, 13 of them between a pack and two packs a day, and quit 26 days ago. I shut myself in the house for almost a week until I got over the actual nicotine part (for myself, and public safety) and started using one with nicotine free liquid just to help with the mental/habitual aspect. It's worked wonderfully for me.
The initial investment was only $70 too, which where I live is less than the cost of 10 packs. Only counting the cost of one pack a day I've already saved $120!