Most games out now are all in dvd format,so what they do is rip them to smaller size to make em fit on a cd-r,but they're still unable to be played without some kind of modchip,be it a plug and play unit like the neo-key that plugs into your usb port,which still requires you to first put the gameshark in the ps2,and then start a game without codes and switch the gameshark with the cd-r,doesn't work with dvd-r at all,then there's the knife trick,which doesn't require anything but to phisically modify the tray comming out,you'll still have to switch with a gameshark.There's a whole messageboard devoted to that subject and playing backups on the ps2 or xbox without some kind of modification is IMPOSSIBLE.I used to be into that stuff that's why i know,i tried it all,not really worth the money since games loose the fun factor if you haven't spent your hard earned money on em.

Besides they're all no good anyway exept for a few.