I haven't play RoR, yet, (tried to install it and it didn't like that idea too much..) but I play a game called Insane (or 1nsane, how ever you want to spell it) and I made a Ranger for that game (well, two actually). I made one of my Ranger which is a 93 4wd ext cab, and then another of the 02 Mazda b2300 regular cab, that we had a while ago. I like it becuase you can make a car and see how it would look lifted and what not. It isn't easy at all, just takes quite a bit of practice, but once you get the whole process down, it isn't that hard, just ALOT of steps.
One that somebody else made:
My 93 Ranger
And my 02 B2300
As you can see, my two clearly are not finished.
I might have to look into RoR and making cars for it one of these days. it looks liek a really fun game