Close to none unfortunately because Polyphony Digital focuses on a new Gran Turismo game for the PS4 that will follow the steps of GT6. I don't think RM will return in GT7...
GT2 hands down (Driving physics! FTW). I first played it in 1999 when it debuted. I found and drove alot of cars I did not even know about and may not have known about to this day if not for that game. I played for a few years at least and achieved 100% completion legitimately. Then I got a PS2 and later GT's came out, I still played it on occasion for a little bit (on my PS2). Though until 'relatively' recently, it had been around a decade since I really played it, or played it at all for that matter.
( I restarted playing it this summer ) But I think it was one of the most ( if not the most ) "buggy" installments of the series. For example after setting 10 records on the machine test mode , your entire garage would vanish. Also the game couldn't identify the cars' classes correctly (Aside from the drivetrain and horsepower limitations ). For example one could complete the American Nationals event with a Japanese car ( this applies for the most of the events ). Lastly it was kind of bummer that the player could only store 100 cars on his garage , which means that you'll have a hard time with deciding which car you're going to keep and which you'll sell. 
Bummer, well i'll try changing save IDs then.
It becomes harder and harder to play these games every year, even though they're still fantastic.
I just wish that there was a better way to play old games (that is legal, lol). Firing up the PS1 or even PS2 on a 1080p TV is always an exercise in eye strain
GT2's online is dead because, well, it never existed.
Perhaps you meant to ask this in the GT6 section?
Memcardrex is the first program I would point to but again, I have never tried it.
. Good thing i haven't play so far.
Long Live GT2!
