Would there be a possibility through some ''hack'' to replace the traffic and the police cars (the SUV and the sedan one) by some of the playable cars in the game?
I mean transform that temp350 traffic yellow cab into a Lexus is300... and replace all the police cars and that suv into only GTO's and C6's respectively. An exception would go for the truck as there are no licensed trucks in the game originally to run on.
I honestly don't know how difficult it should be to create mods for the consoles.