Hold Up and press the L + R at the track selection screen. An air wrench sound will confirm correct code entry. Highlight the El Paso track and press Z + A to start.
Flagstaff track
Hold Left and press the L at the track selection screen. An air wrench sound will confirm correct code entry. Highlight the Mojave track and press Z + A to start.
Guadalupe track
Hold Down and press R at the track selection screen. An air wrench sound will confirm correct code entry. Highlight the Vegas track and press Z + A to start.
Quick start
Press A at the starting line, just before the word "Set" fully disappears from the screen