Go to Extra's on the Main Menu, select "Cheat Codes" and enter the following password.

COOLPROP 3 Props in Stunt Creator Mode
NOBLEMAN All Items Unlocked for Construction Mode
GFXMODES Several new camera effects and styles
hollywood Slow-Mo/Thrill Camera
Kungfoopete Unlock All Cheats
IceAge Unlock Ice Wheels Cheat
TheDuke Unlock Nitro Addiction Cheat
Imtarex Unlock Touchable Cheat
Wearefrozen Unlock Vision Switcher Cheat
fastride Unlocks the MVX Spartan

Unlockables - Complete each achievement to get the allotted gamerscore.

Aftershocker (30) Earn a 1 star ranking in all Aftershock scenes.
Aftershocker Legend (30) Earn a 5 star ranking in all Aftershock scenes.
Architect (15) Earn a 4 star ranking in all Constructor Challenges.

Big Pipe (10) Host 50 ranked matches.

Commando (30) Earn a 1 star ranking in all Strike Force Omega scenes.
Commando Legend (30) Earn a 5 star ranking in all Strike Force Omega scenes.
Cranker (10) Perform 30 180-degree turn stunts.
Crazy Horse (10) Earn 400 or more wheelie points in one movie scene.

Death Wish (5) Drive or jump into a hazard zone 30 times.
Drifter (10) Earn 500 or more drift points in one movie scene.
Duster (10) Perform 20 over-take stunts.

Entertainer (10) Custom Arena selected for boards the first time.

Flammable (5) Ignite your vehicle for the first time.

Hillbilly (30) Earn a 1 star ranking in all Whoopin' and a Hollerin II scenes.
Hillbilly Legend (30) Earn a 5 star ranking in all Whoopin' and a Hollerin II scenes.
Hollywood (30) Unlock all of the Taurus Awards.

Legend (20) Earn a 4 star ranking in all movie scenes.
Lord Challenger (30) Earn a 5 star ranking in all Quick Fixes.

Master Challenger (20) Earn a 4 star ranking in all Quick Fixes.
MasterMC (10) Custom Arena selected for boards 10 times.
Millionaire (10) Earn over a million points in any scene.
Most Wanted! (30) Earn a 5 star ranking for all Odd Jobs.

Nitro Head (10) Earn 10 Nitrous in any ranked MP match.

Outlaw (20) Earn a 4 star ranking in all Odd Jobs.

Plugged In (10) Steal a 100,000+ point string in any ranked Backlot Battle.

Race Ruler (20) Earn over 20 first places in a ranked Movie Challenge.
Racer (20) Finish 1st in 10 ranked Backlot Races.
Rammer (10) Earn 20,000 ramming points in any ranked Backlot Battle.

Screwdriver (10) Earn 300 or more airborne rotation points in one movie scene.
Secret Agent (30) Earn a 1 star ranking in all Never Kill Me Again scenes.
Secret Agent Legend (30) Earn a 5 star ranking in all Never Kill Me Again scenes.
Shaver (10) Earn 500 or more close points in one movie scene.
Soldier (20) Finish 1st in 10 consecutive ranked Backlot Battles.
Spinner (10) Perform 10 reverse-180 stunts.
Stealer (20) Steal 6 or more strings in 1 ranked Backlot Battle.
String’n King (10) Get your multiplier to a x100 in any movie scene.
Stunt Constructor (30) Earn a 5 star ranking in all Constructor Challenges.
Super Hero (30) Earn a 1 star ranking in all Night Avenger scenes.
Super Hero Legend (30) Earn a 5 star ranking in all Night Avenger scenes.

Threader (10) String an entire movie scene.
Thrill Seeker (30) Earn a 1 star ranking for all Odd Jobs.
Tornado (10) Earn a 200x Multiplier in any ranked Backlot Battle.
Trooper (20) Finish in 1st place with each of the vehicles in Backlot Battle.
Turtle (5) Flip your car on its back for the first time.

Unbreakable! (100) Earn a 5 star ranking in all movie scenes.
Untouchable (10) Place 1st in 12 ranked Backlot Battles without getting your string stolen.

Wheelman (30) Earn a 1 star ranking in all Overdrive scenes.
Wheelman Legend (30) Earn a 5 star ranking in all Overdrive scenes.
Wheel’n (10) Earn 100 or more 2-wheel points in one movie scene.
Wings (10) Earn 300 or more airborne points in one movie scene.