You can also drag the URL from the address bar for cars & tracks here on RD. CM will figure it out. That's kind of how the Mod Shop works. You can do that with MEGA URLs too. You can do it for Skins too, but you need to make sure the skin you're downloading, whichever car it belongs to needs to be selected within CM because that's the only way for CM to automatically do skin installs. There is no way for it to know which car in your collection, so it only uses whichever car you have selected in the Quick > Drive screen.