Great mod, I'm glad someone has finally done this as I was fed up with the white livery. Only problem I have is blurred numbers on the car, do you know a fix for this? Using copy and paste method.
If you installed the textures manually, you have to export the sponsors from the Copy&Paste wep file and also install them as long as Codemasters doesn't revert back to the original livery, or just use the Copy&Paste file itself.
They're black because they're black on the white livery that is currently still in the game for whatever reason.
Something I didn't think would've been affected due to the white livery! My bad.