Type in Cheats as name:

 CARNIVAL     All cars
 SADIST       Choose weapon with right [Shift] key
 TRACKER      All tracks
 CHANGELING   Change car during game
 MAKEITGOOD   1x [F6] no clipping
              2x [F6] flight to the car
 TVTIME       New cams with [F5] and [F6]
 DRINKME      Small cars
 URCO         UFO accessable
 JOKER        Funny changing stuff