There will never be a ps2 boot cd?

[Toaster]

As far as I know the boot sequence is pressed into the disk. The game is then burnt to the disk, so when you make a backup you cannot copy the pressed in info only the game data. The ps1 games had this info in a bad block of data on the disk and the chip supplied the missing data when the ps1 went looking for it.
I feel many people may shoot me down in flames for this answer, but it's close.