I can say for what I have here.
BB navigator 0.20 doesn't even boot on non japanese systems. All you will get is a black screen. Unless some good soul are willing to crack the bios detection/modchip protection on that disc it's not really much useful posting a 2 gig DVD image on the internet ... Ah, I think a copy of it might format the HDD but will not install the drivers on the memorycard ... (It might work for newer units as the drivers for HDD are already in rom)
But old shit like my SCPH-10000 need the system driver update file on the memory card to boot the BB navi.
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...)