Need For Speed Carbon (PS2 version)
Enter the following codes on the main menu - a message will let you know that you've done it right.
Extra cash: down, up, left, down, right, up, square, triangle
Infinite nitrous: left, up, left, down, left, down, right, square
Infinite speedbreaker: down, right, right, left, right, up, down, square
Infinite crew boost: down, up, up, right, left, left, right, square
Need for Speed vinyl: right, up, down, up, down, left, right, square
Carboard box vinyl: up, up, down, down, down, down, up, square
Unlock Bugatti Veyron: hold L1+R1 and press circle, square, square, left, up, triangle, down, X
Check out more NFS: Carbon cheats here.