NARCIS : Entered before playing either a practice race or a championship, it enables the mirror mode.
LAMA : Give access to the third track: China.
IGLOO : Give access to the fourth track: Antartica.
SFO : Give access to the fith track: San Francisco.
QUARK : Enable tiny card mode.
WINNER : Give access to six additionnal cars.
HUTCH : Give access to the cop car.
MADMAX : Give access to the first super car.
More passwords are available and will be released... one day... :p
Secret track: Go to the track selection menu. Highligth San Francisco but press and hold both L1 and R1 before pressing the cross key.