I don't know anyone that it's worked for (weaning off).
The closest I hear is a pseudo-wean:
I quit...relapse --
I QUIT.........relapse --
I QUIT FOR SURE.....................relapse --
OK, I'm SERIOUS THIS TIME......................................relapse
Sooner or later.......it's cold turkey so man up and quit (if you can - a lot of us find we simply can't even once we FIRMLY decide to. Check out AA if you find yourself in that group).
best of luck!