The Sims 2: Castaway Codes -

Cheat Gnome:
Quickly press , , , , while on a lot in Live mode to spawn the Cheat Gnome. It appears at different locations, depending on which island you are on, and must be found. The following codes can now be enabled, which will unlock the corresponding options on the Cheat Gnome after it is found. To use the Cheat Gnome, approach it and press . 

All plans:
Quickly press , , , , . 

All crafting resources:
Quickly press , , , (x2), . 

Maximum current food and resources:
Quickly press (x4), .