While playing the game press L1, R1, Up, X, R2 to enable the Cheat Gnome so it now appears on the lots. Then during game plays select it and enter the following codes to unlock the corresponding effect.
Unlock 9,999 Simoleons
Press R1, L1, R2, Right, Left.
Unlock ALL Locations:
Press Circle, L2, Left, and Circle, Up, Circle.
Set Skill Level:
Press Triangle, Circle, Square, R2, and Left.
Advance Time 6 Hours:
Press Circle, Square, L1, Up, Down.
Unlock Full Motives:
Press Up, Circle, Up, Right, L2.
Unlock ALL Objects:
Press L2, Circle, Down, Left, Up.
Unlock ALL Recipes:
Press R2, Square, Up, Down, Right, X.
Unlock ALL Fashions:
Press Square, R2, Down, Right, Square.
Unlock Horn Audio:
Press R1, L1, R1, L1, Triangle.
In using the up and down right and left you need to use the analog and you need to be fast....
Added by: kyrenmearr Feb 17th 2008, ID#29201