Finish first place on the indicated track and circuit to unlock the corresponding racer:

Racer	Track/Circuit
Sebulba	Boonta Classic/Galactic
Aldar Beedo	Beedo's Wild Ride/Amateur
Ratts Tyerell	Howler Gorge/Semi-pro
Mawhonic	Andobi Mountain Run/Galactic
Slide Paramita	AP Centrum/Invitational
Clegg Holdfast	Aquilaris Classic/Amateur
Bullseye Navior	Sunken City/Semi-pro
Ark Bumpy Roose	Bumpy's Breakers/Semi-pro
Wan Sandage	Scrapper's Run/Semi-pro
Bozzie Baranta	Abyss/Invitational
Neva Kee	Baroo Coast/Semi-pro
Ben Quadinaros	Inferno/Invitational
Teemto Pagalies	Mon Gazza Speedway/Amateur
Mars Guo	Spice Mine Run/Amateur
Boles Roor	Zugga Challenge/Semi-pro
Fud Sang	Vengeance/Amateur
Toy Dampner	Executioner/Galactic