just a little discovery i made with addon mods with the menu and car logos that are included but sometimes never seen.
try moving the logos included with the mod download files from the uidata/menu/texture_mamba folder (if thats where they are) to the uidata/menu/textures folder.
now i'm not sure this will fix everybody's problems and truth is i haven't any clue why this works as i am in no way, shape, or form as talented as the modders that bring us these great mods,track and addon's in the sim-racing world we all enjoy heck i wouldn't even claim to be a great car skinner,
but i'm guessing that maybe it's the difference from a steam install and a offline install. btw i have the offline race/evo/stcc combo install.
i hope this helps someone, i have all my logos appearing ingame now and it's not bugging the crap out of me anymore
and if this is not the first thread on this topic then please forgive me for starting another one