Somewhere in the mod, there is a readme, in it will be a contact for who created the mod. Or I would join the rFactor central forum, there you would be surrounded by rFactor modders and users. Probably a better place to ask about modding rFactor.
[
www.mediafire.com] Some say you should click it, you know you want to.
[
www.gp4central.com] <----GP4 Central