In any lapping race (not point to point events) as you cross the start/finish line press the Zone cam button. (L2 on my setup) Thats the one that makes the camera circle your car. If you time it right so your rear wheels are on the checkered line, you will recieve 180,000 NFS points. This wont work at the very start of the race but it will work at the end of the first lap an every lap after thil the end. It wont work at the end of the last lap cause the race will be over as soon as your front wheels cross the line.
To race no opponent in 1 player Challenge mode. You will need two controller fro this. Make sure to set the race as Single Race, it will not work in any other mode. Then set the Race Options to 1 opponent. Then switch the setting to 2 players. Go thought the car setup and pick the track. After the race loads. Quit the race before it starts. Now go back to Challenge Mode and Switch the Players Option from 2 to 1. After that go to car Select, for this to work you have to pick the same car and do the same at the track select. After the race loads you will have no opponent.
Complete the hot pursuit and championship event trees including both of the bonus events (Event 31) to unlock Event 32 in hot pursuit ultimate racer mode.
Tropical Circuit
Complete Championship Event 29
Tropical Circuit II
Complete Championship Event 28
Unlock Corvette Z06
Complete Hot Pursuit event 13.
Unlock Diablo Murcielago
Complete Championship Event 21.
Unlock Ferrari 360 Moderna
Complete Ultimate Racer Event 32
Unlock Ford Crown Victoria
Complete Hot Pursuit Event 5.
Unlock Porsche Camera GT
Complete Championship Event 26.
Unlock Vauxhall VX220
Lead all laps in a Single Race (one player, 4 laps, world racing, gull grid, advanced).