At the Main menu enter the following codes at the 'Enter Code' screen to unlock the corresponding.

Unlocks 'Payout' Mode:
Enter the code: WGR

Unlock Freeplay on Xolten:
Enter the code: BIG

Unlock Freeplay on Love Machine:
Enter the code: HOT

Unlock Freeplay on Tee'd Off:
Enter the code: PGA

Unlocks Custom Balls in Options:
Enter the code: CKF

Unlocks Optional Tilt in Options:
Enter the code: BZZ

Unlocks Playboy table for Freeplay:
Enter the code: HEF

Unlocks Freeplay on Strikes 'N Spares:
Enter the code: PBA

Unlocks Aces High for Freeplay:
Enter the code: UNO

Unlocks Central Park for Freeplay:
Enter the code: NYC