Did you jam the PS2's drive door sensors?
but when I swap the disks, I get the good ol' "Please insert a Playstation or Playstation 2 format disc". Maybe I burned too fast? I think the slowest my drive goes is 4x or 6x. I really want FMCB.
If you still need help in adjusting the LBA of a certain file in an ISO, I can help to give you instructions on doing that with a HEX editor.
Otherwise, you could borrow a friend's modified PS2 (Of the same region as your's) to install FMCB for your console.
SCPH-10000 S. MINOKAMO v1.01 (Defunct)
SCPH-10000 S. KISARAZU v1.00 (faulty)
SCPH-15000 S. KOHDA (With warranty seal!) :D
DESR-5100 S. EMCS