GT2 is the finest racing game released on PSX. Anyone tells you different, they're lying, or they ride the "short" bus.
All of these things were delivered by polyphony digital on a level no other racing title has even aspired to do. much less come close to pulling off.
You can tweak everything. I actually like this one more than GT3, since you can customize paint schemes in 2 that -inexcusably- was removed as an option in 3. The racing course designs were superb, the a.i. wasn't devious but more than competant, and the value would have you playing for months to get everything. If you're still trapped in the days of PSX, or if you're looking for a classic racer...there is no other choice for drivers.