Instructions
Press "L1," "R1," "Up," "X" and "R2" to get the gnome on the lawn. The gnome will appear next to your mailbox.
Input the desired cheat code. Each code must be entered in under 30 seconds. If done correctly, you will hear a woman scream.
Direct any Sim in your house to the gnome. If you are using the "Max All Motives" cheat, send the Sim whose needs you wish to fill. Click on the gnome to see the list of cheats available to you. Select one to use it.