retail

So i was checking games out on redump.org, and i remembered that people say that Ridge Racer V is the 1st game to have gone gold for the PS2 redump says the exe date is 21-february-2000 but street fighter ex3 says its 17-february-2000 but it has a higher disc id number slps-20001 for RRV and...

Hello! I have a retail disc version of a game, and I want to add some dlc to it. Is it possible to install dlc onto a retail disc game? I have the .rap files for the dlc of course, or is it only possible to install dlc to PS3 games in ISO format? If someone could explain this me, I'd appreciate...