Unlockable Driver Password
     To enter the code, go to settings, then password.

426378: You get Joey Logano as a driver 



Extra boost before a race
     Before  a  race  starts,  after you hear the announcer say "Start 
your engines", repeatedly tap A and you will get extra boost.



Unlockable drivers

Billy and Bobby Backfire:     Beat the Dirt Series

Joey Logano:                  Win 51 trophies

Kelly Kates 
and Linda Leadbetter:         Beat the Street Series

Maurice L'eclair 
and Monica Torres:            Beat the Euro Series

Richard Petty:                Win 43 trophies

Shakes McDaniel 
and Thriller Tadwell:         Beat the Xtreme Series

Terri Winsome 
and Luke Trigger:             Beat the Muscle Series