No one has confirmed this yet. Theoratically, you either need to have a PAL version of the game disc to get the EU coded car in your garage, and lost all the NA stealth cars, or the other way around, can't get EU stealth cars.Thought I'd let you guys know. Games are region free, you can get them from anywhere and play them on any PS3, I have a US PS3, lived in england and bought UK PS3 games. So it works, Blu ray films however are region coded
PAL disc works in our NA consoles... the thing is you would need to start over a new game with that disc plus you would still need to find all the stealth codes... but it is possible for us to get all the stealth cars here in NA nonetheless.