All cameo FMV sequences: 
At the main menu, select "Features", then select "Create-a-Car". Enter "Seymore Cameos" 
as a case-sensitive name.
Submitted by Brianjr3

Unlock Dale Earnhardt: 
Win the Daytona 500 with Kevin Harvick #29 car. After winning the Daytona 500,a Thunder 
Plate will appear with Dale Earnhardt on it. Alternately, go to Lighting challenge and 
play three of them.
Submitted by Brianjr3

Unlock All-Star Race:
Reach level 16 in your EA Bio.
Submitted by Brianjr3

Unlock Bud Shootout: 
Reach level 18 in your EA Bio .
Submitted by Brianjr3

Unlock EA Bio bonuses and Various other Thunder Plates: 
Upload your EA Bio from other 2004 EA titles, such as NCAA Football 2004, March Madness 
2004, Madden 2004, etc.

Unlock Night Races:
Night tracks Go to season mode, then to "Custom Schedule". You can unlock night races 
for the day tracks.

Alternate Night Tracks: 
Win the race that has a locked version of an alternate night track on the veteran 
difficulty, 3% race length, and damage on visual only. Repeat this method on all tracks 
that have a locked version of it to unlock alternate night tracks.

Easy All Star race and Bud Shootout: 
Instead of reaching the EA Bio levels for the All-Star race and the Shootout, just race 
a season on veteran at 3 or more % race length, damage on visual only, and brake and 
steering help, and win the races.