Game Shark Codes:

Infinite Boost/Special Move  800C3532 01A4
Always Place First           D10C3572 0000
                             800C3572 0001
Stop Race Timer              800B0A94 0000
Unlock Studio Track          800E0256 0161
Unlock Arches Track          800E025E 0161
Unlock Fraggle Track         800E0266 0161
Unlock Disco Track           800E026E 0161
Unlock All Cars              800E02BC FFFF
                             800E02BE FFFF