At the personal options menu, enter the following name and racing team:

NameTeamEffect
r pettersonSwe   All cars
SupercarsGrem  Overhead view
DemonGrem  Bouncing cars
g-rideWest  L.A. style suspension
Buzz AldrinNASA  No gravity
IgnitionUDS   Ignition mode
RamlosaH2O   Water mode   - requires 3D accelerater card
LemmyAce   Hell mode    - requires 3D accelerater card
AvengerZx    Avenger mode - requires 3D accelerater card

Thanks to Revolution readers Eliminator, Desert Fox, Chris, and Berke Berberoí°lu!