I have DaveWS's version 2 soundpack, and several of the cars don't work with it. I haven't looked into why or asked why yet, but it could be related to HondaCivicSI's not working. In my installation of the soundpack, none of the demo cars work, the LX4 doesn't work, the FZ50 DOES as it replaced a poor FZ50 sound that I originally had, and the FZR, I'm not sure. I had deggis' Lambo V12 sound, and I believe DaveWS's pack stated a different FZR sound of a flat Porsche 6 cyl or something. I could be wrong with the FZR though.