Red,
First of all welcome to KTC. Second, You seem to be off to a good start. I would recommend posting roll in your group Pre-HOF January 2014 (since you quit 4 days ago).
The good news is that you are close to have nicotine out of your system entirely. The bad news is that you are still an addict, the chemical is only part of the addiction. You will need the support of your group and they in turn will need your support.
You need to dive in head long get to know the group of people, you don't have to be friends but you will notice that this is all about brotherhood. This is one of those opportunities in life where you are given a chance to be adopted by and adopt a couple thousand people to help you.
You seem to be driven to quit and the biopsies are scary as hell. I also want to urge you to look at one day at a time, never worry about tomorrow, plan for a week or anything. Just kick ass today, then when tomorrow rears its head post roll and kick the shit out of it too.
You can do this, now saddle up and starting riding with your group.
Pinched