The first two options are often used by users who have a Playstation 2 which is incompatible with the exploit and do not have a modchip, but have a Swap Magic. Use M.R.Brown's PS2 Independence Exploit to allow boot from memory card when an assigned PSX disc is inserted.Use your modchip's Devolution Mode 2 (DEV2) to allow direct boot from hard drive on system startup.Use your modchip's Devolution Mode 1 (DEV1) to allow direct boot from memory card on system startup.Use Swap Magic 3.6's USB functionality to boot mass:/SWAPMAGIC/SWAPMAGIC.ELF from USB mass storage device.Depending on your system setup, you may consider using one of these methods. Most users run the program from either the hard drive or memory card, but it is also possible to run LaunchELF from CD or DVD. LaunchELF is designed to run in a variety of situations. NOTE: You do not have to boot from host in order to access files on host:/.Standard read only host support for volumes specified in host:/elflist.txt.
The latest version of uLaunchELF (uLE) can be downloaded from here.