Amy Winehouse

How to patch a Back up so you can play it on a PS2 for free?(No modchip)?

I cant find out anywhere how to patch it so the PS2 detects it as a real game. I need to know how for free without spending any money. Oh, and if you could give me a link to a download to Okami(US) iso that would be VERY helpful.
I burned the iso on a disk soi just need to know what to do with the disk. ONly thing i need to know is how to make the “legal” copy work on the non-modded PS2