I do not know of a thread, but ALL the logos are stored in the racelogos.tga, which you can have in a mod in the mod's textures folder, and as far as I know you would have to replace the logos you do not want with the one you want, but they would only show up on your computer, and another tip is the 3 SMALLER race logo sizes are ONLY in the alpha channel of the tga.
hope this helps.
harpo
Thanks for that information and advice!