Honestly, you're best off taking whatever unique logos (gonna save you the time, there are none, not even the numbers, I'm positive I've seen that font before and I probably have it somewhere) are on that car and then using that as a reference. It's not going to transfer cleanly unless you repaint it and use that as a reference -- and honestly, it's pretty good at being a reference.Somewhat. They fit into the template nearly perfectly with a little bit or resizing.
Don't feel too bad about that either, one of my first NR2003 paints was a conversion of a car in Nascar Racing 1, and that was probably more difficult than this would be, since I had to upscale logos (which you would not have to do). The only thing that might be a pain is the really subtle drop shadows on the base.
Do you know how much on some of the tracks over the years has been 'borrowed" from other games? 3DO's, surface textures etc.. There is a lot more than you think, Even with rfactor1. You see a lot of NR2003 content there as well. I'm not even sure if it's possible to get textures out of that game.
Out of rFactor1? Already been done. From NASCAR 09? Not as difficult as you might think, but also probably not as obvious.