More test results + bug list updates
I've successfully FMCB v1.8C on one of my compatible 64MB cards.
It boots up fine too. Except, maybe it takes a little longer for the PS2 to decrypt the FMCB KELF from the card because the card is a little slower.
Maybe someone else who owns compatible cards could try installing FMCB v1.8C to see whether card compatibility is better with this installer?
I think that the problem with the installer freezing after creating the uninstall file is indeed a problem. On my SCPH-39006 (v8 with BIOS v1.60) console, the installer will freeze in the same place (After creating the uninstall file), every time.
On a whole, the installer appears to not cause corruption. Other than the freezing bug and the lack of support for the APPS folder, it seems fine so far. :D