The program uLaunchELF is a third-party file browsing system that is designed to allow you to run various "home brew" and "user created" programs and games on your Sony PlayStation 2 video game console. This program does not require you to modify your PlayStation 2 in any way, so it does not void your PS2's manufacturer's warranty. Booting into uLaunchELF from a CD is no different than loading a regular game on the system.
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Press the "Power" button the front of your PS2 to turn the console on.
Press the "Eject" button on the front of your PS2 to open the console's disc tray.
Place your uLaunchELF CD into your PS2's disc tray.
Close the disc tray. Restart your PS2. Your PS2 will now boot off of your uLaunchELF CD.