How many months does it take to get cured from hitting on every good looking woman you run across?
If you're a guy, you'd know it better than I do.
Seriously, imagine the paradigm change. What you've been used to for years is, if ANY girl catches your fancy for ANY reason, you start to rope her in and "get" her. That's the game. Then you save her digits in case you want more of her later. You juggle your schedule so that you're putting a nice face on for the real people in your life, and allowing enough "down time" (way down, LOL) to sample all the fruits along the way. LIE LIE LIE and carve out this screwing time into your schedule.
NOW, you are going to force yourself to try NOT to pick up on ANY woman, even the ones that throw themselves at you or TRY to tempt you. You want to be held accountable. You will need people constantly around you to help remind you. You need to rekindle with the wife so that in your mind, sex= Elin.
I think it will be very difficult for him. He seems to also want to be a better sport and a better person in the non-sexual arenas of his life as well. TOUGH. But golf is tough too, so I hope he can do it.