Aerial Tricks
Turn off damage in the options screen. While racing, turn around and slam into an oncoming car. You'll do aerial stuff like front flips and barrel rolls. It won't help you win the race, but it's fun.
submitted by squid99@aol.com

Dirt track mode
Halfway through a race, pause the game. while holding R press Z(2 times)then press up,down, plus L(5 times). This wil make the track dirt.
submitted by bubba

Paintball Mode
To activate Paintball mode, select single race. Then, while pushing the d-pad LEFT and holding R, press B, and B + A [three times] at the track selection screen.
submitted by Adam

Play as Bobby Allison
To race as Bobby Allison, select Charlotte track, highlight “Select Car”, then quickly press up-C, left-C, down-C, L, R, L, R, Z, Z.
submitted by Adam

Play as Alan Kulwicki
To race as Allen Kulwicki, select Bristol Day track, highlight “Select Car”, then quickly press Z [eight times] followed by R [twice].
submitted by Adam

Play as Benny Parsons
To race as Benny Parsons, select Richmond track, highlight “Select Car”, then quickly press up-C, right-C, down-C, left-C, Z [three times], L, Z [twice].
submitted by Adam

Play as Cale Yarborough
To race as Cale Yarborough, select Darlington track, highlight “Select Car”, then quickly press L, R, L [three times], R [twice], Z.
submitted by Adam

Play as Davey Allison
To race as Davey Allison, select Talladega track, highlight “Select Car”, then quickly press up-C, left-C, down-C, right-C, L, R, L, R, L, R.
submitted by Adam

Play as Richard Petty
To race as Richard Petty, select Martinsville track, highlight “Select Car”, then quickly press up-C [twice], down-C [twice]. Left-C, right-C, left-C, right-C, L, R.
submitted by Adam

Quieter Engine
You all know how loud your engine cna be when racing. Here's something I found to quiet the engine. At any time during a race, go to the instant replay screen and choose the camera angle that is in the car or in front of the car looking forward. Now, go back to racing and you'll have a quieter engine.

NOTE: If you change your view while racing your engine will revert to being loud.
submitted by Ryan Decker