Need For Speed Underground Rivals cheats and cheat codes for Sony PSP

Getting boss cars:
Check event descriptions. If you see a "Boss Race", you have a chance to
award a boss car. To get one of the four boss cars (Chevrolet Corvette
Z06, Nissan Skyline R34 GTR, 1969 Dodge Charger, Subaru Impreza WRX STi)
you have to win in gold difficulties "Boss Race".

Unlock extra parts:
Earn gold medal in the last race

Listen Music:
Select "EA games Pocket Trax" from the main menu. You will find
two the song: Soulwax: "Any Minute Now" and The DONOTS: "We Got The Noise"

Unlocakble cars:
1967 Ford Mustang: $65000
1969 Dodge Charger: $44000
Chevrolet Corvette Z06: $72000
Dodge Neon: $17000
Ford Focus ZX3: $18000
Ford SVT Mustang Cobra R: $56000
Mazda Miata MX-5: $19000
Mazda RX-7: $34000
Mazda RX-8: $48000
Mitsubishi Eclipse GSX: $32000
Mitsubishi Lancer: $51000
Nissan 240SX: $30000
Nissan 350Z: $54000
Nissan Sentra SE-R SPEC-V: $21000
Nissan Skyline R34 GTR: $70000
Pontiac GTO: $46000
Subaru WRX STi: $46000
Toyota Celica GT-S: $23000
Toyota Supra: $52000
Volkswagen Golf GTI 2.0L: $22000