So did he stop drinking.. or is he still "thinking about it"?
I would say he needs to go to a doc (again) and be TOTALLY honest about his drinking, his w/d symptoms, and soon. Detoxing can be very dangerous if not done under medical supervision or with medical guidance. I have also heard doctors tell people to cut down, but this is impossible and horrendous for alcoholics. There are medications that can be taken for 2 or 3 days that can help with withdrawal dangers. All of this can be done in a detox setting, which usually lasts a few days. What is he willing and wanting to do? Cuz so far he's done exactly that.
There is nothing YOU can do here, besides take care of you, and decide if this is what you want to continue living with.. I can tell you this, he sure wont be living with it for very long if he keeps it up, from the sounds of it. It's a horrible way to go..