Very nice!! I kinda wanted to get into rFactor, but never did. I love the way people can mod and create their own cars and the game fully supports it. I have an idea like that for a game I'm working on with some friends of mine. But that's all the details I'm going into about that.
Have you thought about just saving the mod that you downloaded on your computer and putting it up on a server for a few days every now & again for people you know to download? Anyways, great work got those involved, there are really some talented people out there who do this kinda stuff just for fun!!
Laters,
Brian