PS1 on PS2?

I downloaded some brilliant PS1 isos, but i want to play them on my PS2. Can i just throw the ISO onto the disc (using alcohol 120%) or do i need to do something else?

Your PS2 needs to be chipped in order to play "backups". There are some videos that teach you on how to chip a Ps2 with a credit card but it wouldn't work as good. If you manage to chip your Ps2 no matter what way, make sure to burn the .cue file at the lowest speed.