Leo watched a progress bar fill up. It wasn't fast. The USB 1.1 ports on the PS2 were notoriously slow, and the fragmentation process took time.
Creating a ul.cfg configuration file so the PS2 knows how to reassemble and boot the game. Patching games for better compatibility with USB loading. usbutil ps2
Create the file /etc/udev/rules.d/99-ps2-adapter.rules : Leo watched a progress bar fill up