If you're considering purchasing or have purchased a PS2 model SCPH-90006 and are looking into BIOS updates:
: For those wanting to make their NTSC-J console region-free or play backup discs, MechaPwn is the modern "new" standard for soft-modding the hardware. Using the BIOS for Emulation If your goal is to use the SCPH-90006 scph90006+bios+new