But you bought a "VGA/XGA box or TV Tuner" noted at
http://www.macsense.com/product/peripheral/atv100.html

This will get it working but don't delude yourself. The PS2 outputs 480i signals so it may look a little sharper on the AOC display but never awesome no matter what you use since it is only 480i.

And I decline to write what 480i is here. You can google that.
Bob