To convert your existing PS1 library, the industry-standard tool is Download and Extract: PSX2PSP tool and run it in Classic Mode (UI mode is known to be buggy). Select Files: ISO/PBP File to select your files. For multi-disc games, add all discs in order. Configure IDs: The tool should automatically fill in the
PBP stands for PlayStation Portable Package File, but it's also used in contexts related to PSX/PSOne games. Essentially, PBP files can contain game data for PSX games in a format that's easily distributable and manageable. pbp psx roms top