I didn't find something like this in the search...
I'm sorry if it has already been released.
However, before you can use this, you have to be in Act 4 Inferno or use the old Trick to get there...
After you left the Public Game, you can continue it in the Singleplayer.
This Method needs much time and if you have nice Gear it's better to farm somewhere else, but if your Gear is Bad, it's maybe better then Farming Trash Items in Act1
Well, just look my Video then
[Edit: The end of the Video is cut, i don't know why, but I think I won't upload it again...
but well, you see, it works.]