NBA ShootOut 2003 Cheat Codes for Playstation 2

Perfect shots:
Press Triangle, Square, Triangle, Up, R2 at the main menu, the start a game in exhibition mode. All shots you take in front of your team's crease will go in.

Extra points on free throws:
You can get extra points on free throws by shooting one basketball before the green or one after. You can do that, then your teammate will get two more points.