thanks guys....metally its not the tough...Physically is a whole different story.  Like I said, the headaches are unbelieveable.  This is my third time quitting, but first time really going into it 100%.  As most of you know I am a civil pilot right now, and attempting to make a career in military aviation.  My family has a history of heart condition, and I know if I continue to smoke, I will end up having a heart attack before retirement, grounding me, civil or military.  i'm in it 100% this time.
thanks  cav