Punch these in after pressing start. Unlock the cheat gnome, and activate it, before you start entering the codes:

Unlock Cheat Gnome:
R1, L1, Down, Square, R2

Fill All Motives:
R2, Up, X, Square, L1

Give All Plans:
X, Triangle, L2, Square, R1

Give All Resources:
Square, Triangle, Down, X, Left

Max Current Inventory:
Left, Right, Square, R2, Square

Max Relationships:
L1, Up, R2, Left, Triangle

Set Skills:
Triangle, L1, L1, Left, Triangle