Playstation developer Duplex has managed to decrypt PSN games and another Playstation developer ScHeVeNs has released a method of playing PS One games on custom firmware.
Source :http://psx-scene.com/forums/content...ed-ps-one-games-running-custom-firmware-1503/
Since no scene group managed yet, we thought it's time to work on some
PSN games to give everyone something to play for CFW 3.55 .
Fully decrypted .elfs are included as proof and of course for
educational purposes
1.) copy files to FAT32 USB Key/USB Disk
2.) install game *DUPLEX.*.Install.pkg
3.) install patch *DUPLEX.*.Patch.vX.XX.pkg if any
4.) install crack *DUPLEX.*.Crack.pkg
5.) play
Source :http://psx-scene.com/forums/content...ed-ps-one-games-running-custom-firmware-1503/