If you go to quick play and choose any mission except a job when you're picking your car press r1 or r2 (i forget which) 2 and all the code cars will be there!
first pause then go to options then go to the bottom and theres cheat codes then enter the code
if its bonus cars u get it in quick race mode go to event map.if its a regular car then you go to shop
go to menu, options, secret codes and type the code such as S1D3K1CK, that code unlocks $15.00 in career mode and works once only per profile :)
If you have a PS2 you can go to the cheats menu in the career menu then select cheat codes
Go to Quick Race, then click to go to the Event Map (don't go to My Cars). Select an event first, then the game will ask you to pick a car. When it does, just scroll over till you see the "Bonus Cars" section; all the cars that you entered cheats for will be in there. Or if you have unlocked tier 1 cars go to my cars and trick out the Bugatti. then do what he said
If you have Action Replay go to Google and type in 'Action Replay Cheats Gamecube' or if you only want cheats to enter in the cheat section of the game go to 'www.cheatmasters.com' there you can cheats for any console including Nintendo 64.
Go to this site, or copy and paste, http://sites.google.com/site/sansapsp/ then go to: PSP Game list (there are two lists.) . NFS Undercover would be in a huge thumbnail in the top section.
Jak and Daxter because NFS Shift is professional street racing, on racing tracks, if you want a traditional NFS game i'd go with NFS Undercover. Although buy Jak and Daxter first.
you go to the career menu after loading game press triangle and enter your cheat
go to main menu go to options then go to the last bit
get nfs 4 the ps3 graphics r better an u can get cheats 4 itnvm wat he just said all you gotta do is find the cheat you want go into career go into code entry enter secret code and type it in. But if you got the update it gets harder in order to make cheats work you need to practicality wipe your harddrive of nfs prostreet :(
When you have enough cash, go to the dealership (located in the menu that you look at your cars) and pick one you can afford and click buy it