Activate the following cheats by entering the corresponding case-sensitive passwords at "Options" > "Passwords":

CHEAT FUNCTION - CHEAT CODE
Bridgestone items unlocked - notjusttires
Buick items unlocked - threestripes
EA items unlocked - inthegame
Grafalloy items unlocked - justshafts
Infinite money - cream
J. Lindberg items unlocked - jlindberg
MacGergoritems unlocked - mactec
Mizuno items unlocked - rihachinrizo
Nike items unlocked - justdoit
Oakley items unlocked - jannard
PGA Tour items unlocked - lightning
Ping items unlocked - solheim
Precept items unlocked - guysaregood
Taylormade items unlocked - mradams
Unlock Wayne Rooney - playfifa08
Unlocks all course - greensfees
Unlocks all golfers - allstars