Hi, Specs: OS X 10.5.11 Racer 0.5.4.3 I've downloaded many cars and some have issues: -Sound files present but no sound (I was able to modify the ini and correct this issue) -Steering wheel and tires turn but car does not drive. No gas no brake etc . . . - Many do not load after being placed in the car's folder I notice some of the cars have a file from version 5 What are the changes to 5.4.3? I want to fix the non working cars to be functional. Thank you.