try pasting this into \Grand Prix 4\GPSAVES\Carsets\2003
[General]
Name=2003
Preview=2003.jpg
Info=Desc.txt
[Wad]
Cars=cars2003.wad
Anim=anim2003.wad
[Settings]
Qualify Laps=3
QuickRace Length=100
Team Dependent=1
[Team Art]
Team Art=
you will also need 2003.jpg, Desc.txt, cars2003.wad, anim2003.wad in the same folder.
____
Tony