Format Disc for PS2

[makluda]

I got the ps2 working now thanks Bg. I put in a ps2 games and it reads it as NO DATA its asking me for my format disk, I never got the instructions on how to play the games. I thought i would have gotten it but didnt. I thought you dont have to use a format disc of any sort since its a messiah modchip. What do i need to do to play the games when it says format disc needed? thanks