When starting a association mode,make sure to turn all rounds in the playoffs to one game,you can keep the length of the season at 82 or shorten it if you want too. pick a team like the lakers or the heat and sim through the season till you get to playoffs.set each quarter to 1 minute to finish each game as fast as possible.change the sliders in your favor if you want to make sure you dont lose and then simply play the four games and the achievement will unlock by the end of the championship game.