Things You'll Need
Instructions
Download and install Nero, a CD burning program, onto your computer.
Download uLaunchELF ISO. Extract all the files from the folder and using Nero, burn the program onto a CDR.
Place the burned CD into your powered down PS2 and plug your USB drive into the system. Power on the console and you should the Ulaunch ELF menu. It will list your memory card drives as well as your USB flash drive. You can now place files from your PS2 onto the USB drive.
Download any files you wish to boot from the USB drive, such as emulators with homebrew games or saved game files. Make sure these files are in the .elf format before downloading.
Insert your USB drive back into the computer and transfer any files you wish to use from your PC onto the drive. Remove the drive and plug it back into the PS2.
Using the uLaunchELF disc, you can boot the files directly from the USB device or transfer them to your memory card (in the case of save games).