Several tools can manage or edit this file depending on your operating system:
The file is a critical database used by classic PlayStation 2 homebrew loaders like USB Advance , USB Extreme , and Open PS2 Loader (OPL) . It acts as a table of contents that tells your console which games are stored on a FAT32-formatted USB drive and how to boot them. ul.cfg ps2 editor
The ul.cfg file serves as the or catalog for these fragments. It tells OPL: Several tools can manage or edit this file