you have to win stages!
Finish the game (after every 2 races a new car unlocks)
To unlock cars on the Sims 2, you'll need Sims 2 Nightlife.
A tool to unlock levels on Backflip Madness can be found on addoncheats.com/backflip-madness-cheats-hack-score-unlock-all-level/
i know the answer (it is already opened) and it has more cars the normal ones and new tracks and cars
no i don't think you do
go to your need for madness 2 folder and then go to graphics and then open it there willl be cars names and go to one of them which one you want to hack when you open it there will be car pieces like (123,45,98) and then change them
you dont need to unlock them you get them for free
no there is not a cheat to unlock everything in Need for Speed: Carbon
Lots of new cars and stage even twin powerd street racer
under every locked car it is written that what you have to do like winning 5 circuit races, scoring 8000 points [professional only] etc.
you have to do all races
download Mega train for need for speed underground to unlock every things related game