It's not really a mod for Dirt Rally, but it's a mod that allows you to choose any car on any track in the very first Colin Mcrae DiRT. just drag the cmr6game.bin into the database folder and enjoy, don't forget to make a backup cmr6game.bin file in another folder just in case you wanna restore the game back to the way it was. I don't know who made this mod, nor do I have any other place to put it, (I have not made this mod either), but I was able to snag this awesome mod before it was lost into the internet. If you have DiRT 1 on your computer and are looking for a more unique experience, definitely check this out.
Enjoy!
Enjoy!