Type the cheats below at any menu to activate the cheat:

Bullhorn - police talk on bullhorn
Elnino - enable El Nino car
Merc - enable Mercedes CLK-GTR
Jag - enable Jaguar Sports car
Empire - enable empire city track
Rushhour - lots of traffic
Gofast - twice the speed in single player
Allcars - enable all cars (including pursuit)
Newcars - bonus police cars

Type the codes below then click Race to drive the different non-player cars:

go01 - Miata
go02 - Toyota landcruiser
go03 - cargo truck
go04 - BMW 5 series
go05 - 71 Plymouth Cuda
go06 - Ford Pickup with camper shell
go07 - Jeep Cherokee
go08 - Ford fullsize van
go09 - 64/65 Mustang
go10 - 66 Chevy pickup
go11 - Range Rover
go12 - school bus
go13 - taxi: Caprice Classic
go14 - Chevy cargo van
go15 - Volvo station wagon
go16 - Sedan
go17 - Crown Victoria cop car
go18 - Mitsubishi Eclipse cop car
go19 - Grand Am cop car
go20 - Range Rover cop car/Ranger vehicle
go21 - cargo truck (same as 03)