Ken - Welcome to the dark side. I wish I could tell you that this is gunna be easy, but I can't. It's go to hit you harder than any fighter ever has.
Read every thing on the sight - post roll in the May '08 group everyday - go to chat if you need help or just want to hang out - drink tons of water and real cranberry juice (detox agent) - seeds, gum, shredded jerky and fake dip if needed.
You are 100% in control of your quit, we can only help those who really want it.