You have to use the following cheats for the Driver's Name:
ALLTHECARSNOW: all cars in Arcade Mode
ALLTRACKSPLEASE: all tracks in Arcade Mode
LEMANSOFFERS: GT1, GT2, etc in Lemans Mode
ENDOFFERS: all championship cars
MAKEITPEASY: race over 1 Lap in Lemans Mode
MAKEITNORMAL: toggle MAKEITPEASY cheat
TOYOTA1999: Toyota team
1999AUDI: Audi Concept car
19BMW99: BMW Concept Car
DEBORALM: Debora Racing Team
DEBORACING: Debora Racing Team in Lemans Mode
1999CHEATCARS: GT1 and GT2 Cars