Codes:

Hit "Online Multiplayer" in the Multiplayer sub menu and then hit "Promotional Codes". Now you should be able to type in the following code.

astr0b0y - Free Moonraker Skin
v00d00fishy - Play as Baron Samedi (Skeleton) and Jaws (Astronaut)
4u4ever - Play as Goldfinger (Fort Knox) and **** Galore (Pilot)
f1n34tt1r3 - play as James Bond(Jacket)
qbr4nch3d - To Unlock Acute Hearing and Long Reach gadgets
m00nl4s3r - To unlock Moonlaser Mk2