How do you play ISO on ps2

I have an australian ps2 slim and an amarican "The legend of spyro: A new biginning" iso
I burned it to a dvd and put it in an ordenary unmodded ps2 slim, but only to be greeted with
"Please insert a PlayStation or a PlayStation 2 formatted disk

I want to play this without buying anything or turning my ps2 into a supercomputer, please help