Highlight the Trail By Trucking option at the main menu then press Circle to display the cheat menu. After that you must enter one of the following codes to activate the corresponding cheat function.
To get all missions unlocked enter MISSIONS as a code.
To get invincibility unlocked enter NODAMAGE as a code.
To make get $115,000.00 cash enter CASH as a code.
To have no annoying police chase you enter NOCOPS as a code.
To have more cops chase after you enter COPS as a code.
To have more bikers on the road with you enter BIKERS as a code.
To open all bridges for easy access enter BRIDGE as a code.
To unlock all pictures in the gallery simple enter GALLERY in cheat mode.