I'd like to mention that MODCHIPS on some versions cause the OSD loading from memory card to fail.
It's a issue for people with japanese PS2s from 1x000 series as they use the OSD update feature to load HDD modules and boot the OSD 2.00 from the hard disk.
DO NOT TEST this boot method on machines with MODCHIPS. That would bring false "don't work" reports.
SCPH-10000_GH-001 SCPH-15000_GH-003 SCPH-18000_GH-008 SCPH-30001_GH-005 SCPH-30000_GH-016(V4) SCPH-30001_GH-010(V4)
2xSCPH-10190, 2xSCPH-10350, 2xSCPH-10280
"**** j0 hackers!"
-Sjeep (As seen on TOXIC OS ELF...)