You can hear your own Xbox ripped music while driving. You must have music already copied to your hard drive. Go to the Options menu and go to PGR 2 Custom Soundtrack, Press L or R to scroll through soundtracks. Pick a song and then add it.
More Kudos
Use the handbrake when going around a turn.
Unlocking Cars
Unlocking cars requires you to have Kudos Tokens. You can choose a car you want to unlock. Here are the following cars you need kudos tokens for:
There seems to be a loop hole to get great combo bonuses. Unlike the original Project Gotham Racing, this game allows
you to go through the cone gates twice. You can go through either forwards or backwards, and hence build up your combo bonuses.
Play an arcade game
Go to the garage and press Y to walk around. Go to the arcade machine to left of the garage door (where the wheels and filing cabinets are). Press A to play the arcade game. The game is called "Geometry Wars". Here are the controls for the game:
Move: Left Analog Stick
Shoot: Right Analog Stick
Bomb: R
Geometry Wars
While choosing a car in PGR2 hit right to select "garage". Once you are in the garage hit Y and look around for an area that has shelves with tires and rims around it. Go to that area and look for an arcade machine. When you get close to it hit A as if you were selecting a car. It will then go into an "old school" type of arcade game called geometry wars.
The Controls:
Left analog stick: steer in direction you point
Right analog stick: shoot in direction you point
L or R: Use bomb
Unlocking Bonus Cars
When you go into the showroom there are 5 cars under tarps in the bonus area that you cant even test drive. Each car is unlocked by how well you complete the game. Here is a list of what unlocks what:
All Silver Medals or Better: Porsche 911 GT1
All Steel Medals or Better: Delfino Feroce
All Bronze Medals or Better: Ferrari 250 GTO
All Gold Medals or Better: Mercedes CLK-GTR
All Platinum Medals: TVR Cerbera Speed 12