Infinite shields and turbos:
At the "Press Start" screen, press L + R, Z, L + R, Z.
If you entered the code correctly, an "Unlimited Energy/Turbo"
message will appear. Note: The effects of this code only last
for one race and must be re-enabled before
the start of the next race.
Successfully complete XG career mode to unlock the StarCom team.
To get a jump start when you begin a race, hold Forward
during the countdown without pressing Gas. As soon
as "Go" appears, hit the accelerator.