NBA 2K11 Cheats :
JoRdan Challenge Tips
For The Arrival don't play defense, maximize offense time. Since you don't have to win, switch to man-to-man defense and control the player guarding the ball handler. Just move away from the player to get him to shoot as soon as possible.
If you need more time to score points, you can resort to fouling players while on defense to get the ball back.
For The Shootout, after you have done the required number of assists, minimize the Hawks offense time by holding on to the ball as long as you can.
MJ challenge shortcuts for the frustrated
For the MJ challenge parts where you need to limit Dominique Wilkins and Clyde Drexler's scoring, go to 'Rosters' and simply edit their stats and that will severely limit their scoring. Also, if you need help with the rebounding portions, go to 'Rosters' and edit the Michael Jordan you will be using and make him 7'6". This helps immensely. After you are done you can simply choose the 'Reset Rosters' option and all will be fixed.