That depends if you want to make a dedicated png3 install or not.
My advice is to separate modern gtr2 cars from classics png3 cars with at least 2 different installs.
Make a clean gtr2 install in d:\gtr2clean (keep it clean, just make a copy anywhere else by renaming folder when you want to test a mod)
Then duplicate this install in d:\Png3
Then install png3.2 in d:\Png3
Then install GTR2 HQ Patch part1+part2
Then install these Butch's cars
Run GTR2_SETUP.CMD and choose specific png3 options when you see them (png3 UI, PNG3 HUD, PNG3 HQ ANNIVERSARY PATCH)
My advice is to separate modern gtr2 cars from classics png3 cars with at least 2 different installs.
Make a clean gtr2 install in d:\gtr2clean (keep it clean, just make a copy anywhere else by renaming folder when you want to test a mod)
Then duplicate this install in d:\Png3
Then install png3.2 in d:\Png3
Then install GTR2 HQ Patch part1+part2
Then install these Butch's cars
Run GTR2_SETUP.CMD and choose specific png3 options when you see them (png3 UI, PNG3 HUD, PNG3 HQ ANNIVERSARY PATCH)