Complete certain goals to unlock Trading Cards. The following cards will unlock the corresponding cheats:

Page 1 - Qualify for a race on pole
Bronze: Jaques Lazier - Video Clip
Silver: Helio Castroneves - New Car Livery
Gold: Sam Hornish Jr - Nothing
Page 2 - Win a 10 lap race
Bronze: Arie Luyendyk - Create your own team
Silver: Gil de Ferran - Nothing
Gold: Al Unser Jr - New Car Livery
Page 3 - Win a quarter lap race
Bronze: Scott Sharp - Viedo Clip
Silver: Jeff Ward - Nothing
Gold: Robby McGehee - New Car Livery
Page 4 - Win a full distance race
Bronze: Eliseo Salazar - New Car Livery
Silver: Shigeaki Hattori - Video Clip
Gold: Airton Dare - Nothing
Page 5 - Complete Masterclasses
Bronze: Richie Hearn - New Car Livery
Silver: Felipe Giaffone - Nothing
Gold: Sarah Fisher - New Car Livery
Page 6 - Win IndyCar Series
Bronze: Robbie Buhl - Nothing
Silver: George Mack - Video Clip
Gold: Laurent Redon - Nothing
Page 7 - Qualify Indy 500 on pole
Bronze: Rick Treadway - Video Clip
Silver: Alex Barron - Nothing
Gold: Eddie Cheever Jr - Video Clip
Page 8 - Win Indy 500
Bronze: Buddy Lazier - Video Clip
Silver: Billy Boat - New Car Livery
Gold: Anthony Lazzaro - Nothing
Page 9 - Set a lap record
Bronze: Budy Rice - New Car Livery
Silver: Tony Renna - Video Clip
Gold: Dan Wheldon - Nothing
Page 10 - Win a race with 100% AI
Bronze: Homestead Miami - New Car Livery
Silver: Phoenix - Nothing
Gold: California - New Car Livery
Page 11 - Finish a race
Bronze: Nazareth - Create your own driver
Silver: Richmond - Nothing
Gold: Pikes Pike - Video Clip
Page 12 - Win all races in IndyCar Series
Bronze: Kansas - Nothing
Silver: Nashville - Video Clip
Gold: Michigan - New Car Livery
Page 13 - Win the hard charger award
Bronze: Kentucky - Video Clip
Silver: Gateway - Nothing
Gold: Chicagoland - New Car Livery
Page 14 - Collect all of the cards
Bronze: Texas - New Car Livery
Silver: Indianapolis - Nothing
Gold: Borg-Warner Trophy - New Car Livery