The only way to play a other region disc is to take a broken dvd drive of the ps3 and open it make sure the laser works. I just swap my disc simple as that. but you have to open up your machine. This method is all over youtube.
I think he has retail discs and wants to play them on his Japanese PS3 but because of region locking it prevents him from doing so.
The c2d.exe tool says that it does
Allows "converting" a Retail PS3 from one region to another (i.e. EUR PS3 -> JAP PS3, USA PS3 -> RUSSIAN PS3) Changing a Retail PS3 region unlocks playback for region-locked DVD/Blu-ray movies and PS1/PS3 games
It says nothing about ps2 games HOWEVER can anyone confirm this?
I don't have retail game disc, only backup. I used multiman 5 times to get my dump flash on kmeaw 3.55 and it had the same MD5. Anyway i used cex2dex tool and convert my CEX to DEX no error but used c2d tool get error. But i never flash DEX flash back to my PS3.