NASCAR Racing '98

Tow truck:
Select exhibition mode.
Highlight Bobby Labonte's or Kenny Wallace's car on the car selection screen, then hold C and press Up, Down to turn your vehicle into a tow truck.
Additionally, hold A + B + C and press Start to reset the game.
Return to the car selection screen to also turn the last car selected into a tow truck.

Hidden options:
Press Start to pause game play and highlight the "Race Statistics" option.
The, hold L + R + X and press A.
A hidden options menu that allows various game parameters to be changed will appear.

Wide cars:
Highlight the "Stereo" option.
Hold Z and press B, X, Y, A + B.
A voice will confirm correct code entry.
Begin game play and press Start + A + B + C to reset.
Wide versions of the cars will appear during the next race.

Wire frame track:
Highlight the "Control Setup" option.
Hold Z and press A, B, X, A + Y.
A voice will confirm correct code entry.
Begin game play to race on a wire frame track.

Wire frame cars:
Enable the "Wire frame track" code.
Press Start + A + B + C during game play.
Wire frame versions of the cars will appear during the next race.

In-game reset:
Hold A + B + C and press Start during game play.