Your default.dds skin is black, so players can't paint their cars body, only wheels are colorable for now. Replaced default.dds with fully white texture and now i can finaly paint it.
About engine sound, i think it's pretty subjective but also we can replace it manually in mod folder, so it's not really a problem
This interior is just wtf, 2 tachometers, mobile phone.. It needs different steering wheel, for example from XRR. Engine sound is terrible. Also you can't paint a car