Saloon Cars Deluxe (PC)
To fix anything instantly on the car when in the pits (even when your mechanic says it cannot be fixed), press "F" (refuel) for a second time when the engine is not running and the handbrake is on. To be able to race on the test track, open up the !Saloon directory, and go into the directory "DISC2". Open the directory "!SILVER". Rename "DATA" as "DATA2" (as a backup for when you want to reverse the effect). Open the directory "!TESTTRACK" and copy the "DATA" into "!SILVER". Now run the program and select Silverstone as the current course. When you race you will in fact be on the test track.