Pretty tough to do legitimately. Description is self explanatory so if you want to go that route have at it. Or you could just set up a private free roam invite 1 friend and work it out for each other throw the game till you have one dice. then have the other person throw away all of their dice with bad bids (really high) or communicate and work out spot ons. Spot ons are faster when there are more than 2 people going for this.