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Restore copy your files from hard disk (Computer) to your memory card.
The correspondent DEVolution mode is invoked by pressing the R1/R2/L1/L2 pad buttons on PAD1 at the boot of the PS2:
R1 : /BOOT/BOOT.ELF
R2 : /BOOT/BOOT2.ELF
L1 : /BOOT/BOOT3.ELF
L2 : /BOOT/BOOT4.ELF
You could rename ESR to boot.elf and another homebrew to boot2.elf
When ps2 starts, keep pressing the correct button.
in the boot folder wat should be in there
This thread should cover all you need to know..... Note that you need to delete the extra files (this is covered at end of thread) before you try to move the BOOT directory back to the Memor32 on the PC (Savegame Manager)