@NoGoodNames Won't be possible. I just looked at it and the mapping on the LOD1 doesn't match the textures'LOD1 textures (and i'm guessing it could also not match on the LOD2 by extension). So even if you give color to the LOD1, it'll be ascrambled mess.
Also, considering you're working with palette colors, changing a color changes wherever it appears, so it usually affects both LOD0 and 1 and maybe even 2 (it did for the GTR-LM I changed, but I realised afterwards that the LOD2 of the Viper RT/10 in yellow still shows up as Orange at night)
You'd be better off replacing the standard color by the red one on the final model, as (i've checked that too) every other 306 in the demos has a messed up mapping on the LOD1.
@B_rad88! Heh, yeah well in that particular case, the "z-fighting" is actually just because the plane on which the taillights's texture is applied on is extending a little too far back compared to the car's collision, and so it goes through the barrier.
As for the barriers and trees being visible through, that's just a rendering glitch, they're clearly behind the track boundaries.
Dude, if you manage to hex mod a 3d file, you'll be a god. Because I think what you should find are coordinates to every vertex that makes up the car, and also somewhere are going to be mapping coordinates (that don't need to be modded, because the spoiler is mapped already). The spoiler must be made of at least 10 vertices, possibly 12-13 maybe, I haven't counted, so yeah. I really don't think it'll be possible (easily at least).
I wish Zmodeler could export as .C_O ... it can open them, why not save them? :C