http://www.thegtaplace.com/downloads/file.php?id=649
This one is sort of like that, if you can you could print out the car names and ids and then type them in while playing with this trainer.
Would anyone be able to make the pay n' sprays into modding stations like in gta san andreas? at least make the car colors pickable? That was one of my favorite parts of that game in san andreas and its disapointing they decided to take them out.