It`s very simpal.

All you need is a PS2, a 40GB stick and a ps3game.

1. you turn on the PS2.
2. you stick a 40GB stick in the PS2.
3. you put the PS3game in the PS2.
4. now you select "Broser"
5. now you wait till the PS2 sais: "can`t reed CD/DVD"
6. then you hold:
"L1,L2,R1,R2 the hol time and press:
triangle,
triangle,
quadrangular,
circle,
x
then the screen will be black for a few sekunes, after that starts the PS3game!

I don`t know wy, but it works.

so have fun by playing ps3 games on a ps3!