Real Cars is a totalconversion mod for Grand Theft Auto IV that replases all cars and other vehicles in game to real ones.
So this mod is nice. It does bring in a load of realistic cars; which is great for people who aren't clued up on importing them themselves. While it is just a compilation of new cars (including textures, models, and handling I believe) it is still incredibly unstable- often crashing moments after I begin to play.
Additionally no removal option is offered; meaning unless you've backed up your entire game directory, you're stuck with it short of reinstalling the game.
Of course it is great to drive around a game we all love in cars we all know, but the stability issues are the main reason I'm rating this mod at 6. Sort out a nice stable version, without the taxi/cop-car bug and it's a 10!