[quote name='javeryh']How do you register -56 for 18 holes? That's like a hole-in-one for every hole...[/quote]
People were using Gamesharks or other cheat devices that made it so no matter how many shots you took on a hole, it always registered as the first shot. You're right, it gave them a hole-in-one on every hole.
They probably didn't win anything since you had to send Sony your memory card for verification and they'd see the 18 holes-in-one and DQ them.
Every tournament I checked had at least 10 people registered at -56.