They aren't complex fixes mate. I made them when the cars where originally released a good few years back.
I think with the Minardi it was a case of simply copying the lod of the first car, re aiming it as car 2 and then renaming the used textures inside GP4Builder so that the car used a different text file.
It's a shame about the RH files. They are pretty decent, if not a little low quality by today's standards.
Races: 163 - Wins: 23 - Pole Positions: 24 - Fastest Laps: 22
Season 9: Constructors' Champions