Hello again
I get all my cars from sourceforge(will post a link below). I downladed all the linux links and just picked out the cars that i didn't have. As for the kc cars, I couldn't get them to run. What I did was copy the xml file from another car and place it in the folder for the car ( say the gullwing). Open this xml file and the gullwing's xml file. select everything in the gullwing's xml and then copy it. Next, go into the other xml file and select everything, then press paste and save. close the xml files, and then delete the original gullwing.xml. then, rename the other xml file so it has the same name as the car folder ( in this case gullwing.xml), and it should run
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Link for sourceforge
happy to help