So I picked up an used fat PS2, SCHP-50004 (PAL). It came with a bunch of backup PS2 and PS1 discs, so I figured it must be modded, which it seems to be, but I have no idea how. It plays legit PS2 DVD games and backup PS2 games, both CD and DVD. WIth Legit PS2 CD games, DVD movies, legit, import or backup PS1 games all fail to boot, the screen fades to black and goes right back to the browser. For legit PS2 CD games it says they arent a supported format. The system itself seems to be all original, the warranty sticker was still in place (I had to remove it to clean the insides) and the memory card didnt seem to have anything of note on it, just regular game saves and system settings. The backups seem to work fine without the memory card inserted too. So, what mod do I have on my hands? How do I boot PS1 games and legit CD games on it? How can I make my own backups for it? Anything else I could do with it, this being my first modded console? Many thanks in advance!