the race, accelerate forward until you get to about 45mph (70 km/h).

2) Stop and reverse. Before you get to the chequered start line, slam on
the handbrake, and keep it depressed. You must press it before the 10
second mark, and keep it depressed.

3) At this point all of the AI cars will turn around, and attack you (you
will see them instantly turn around on the map).

4) This lasts until the end of the race, and must be re-activated for all
future races. Invisible walls

1) This cheat works only with Mediterranneo and Mystic Peaks. Start the
race, and then find a smackable object, such as a crate or souvenir stand.

2) Reverse into it at 40mph (65 km/h) or more, with your horn blaring. This
will enable the cheat mode.

3) Drive off any side barrier at 100mph (160 km/h) or more, and you'll go
flying! You will be placed back on the track shortly after.