Get All Cars:

In championship mode put in ACO for a name

Petite Le Mans:

When you beat the 10 minute petite le mans race you win 3 red team orca vipers, and 2 corvette c5r (gold/white), and an orange viper GTS R.

Get All Tracks:

In championship mode put in SPEEDY for a name

Get All Championships:

In championship mode put in NUMBAT for a name

Get Credits:

In championship mode put in HEINEY for a name