Overall not too difficult, but it'll take a few tries.
1st: Set your games to All-Conference and 2 minute halves.
2nd: Once the game starts, go to game play settings and turn the "CPU settings" all the way down, and the "User Settings" all the way up
3rd: Let the CPU win the jump ball so you'll have it next half.
4th: Don't score unless the CPU does. Stay at least 1 point behind them or tied with them. (Recommended tied)
5th: Once there is 30 seconds left in the 2nd half, hold onto the ball on the 3 point line, passing it between players to make sure they don't get it.
6th: Once the clock hits 1 second, shoot the ball. Maybe you hit it, maybe you don't. (If you were tied and you miss it, just do the same thing in overtime. Restart the tournament if you lost.)