Open PS2 Loader is a 100% Open source game loader compatible with USB Advance/Extreme game format. It’s more compatible and it should work without PS2Load or change DNASXXX.IMG tricks.

Open PS2 Loader also is developed continuously and anyone can contribute improvements to the project.

The main objective is to support both the PS2 and the PS3 with backward compatibility.

IMPORTANT:
* USB games must be unfragmented. If not, they might not work.
* The compatibility modes have changed

http://psx-scene.com/forums/showthread.php?t=62141