Something else that's really easy is reading the GP4FAQ sticky topic at the top of the page, that will tell you exactly what to do and how to do it. Part of the enjoyment of GP4 is learning how to edit the sim for yourself. A wad is probably too big to email anyway. It doesn't get any easier than downloading csm, then downloading a mod and loading it from csm, but do please read the FAQ first.
[
www.mediafire.com] Some say you should click it, you know you want to.
[
www.gp4central.com] <----GP4 Central