I too have a friend that has kicked his opiate habbit.... You are doing it cold turkey with nothing but support, i am astonished how your holding up.... You are very very strong, and I have so much admiration for you!
If you start to struggle too much dont hestitate to go to your GP doc. Methadone withdrawl is very long.... There are new meds out there with agonist / antagonist, properties that make them almost impossible to abuse and work wonders for people trying to break there opiate addiction. Good luck brother, thoughts and prayers out for you.