[dust2dust]

without reading anything i can see 1 major problem for a ps2 boot disk
not letting the ps2 know that you have opened the tray to swap disk

look at how ps1 boot disk works
psone as well
u have to block the tray open switch

then u got the code from say the messiah
your next big step is to lose those 23 wires

lol
i personally think messia team ,magic team ,and all others have tried failed badly to make a boot disk