I just had my PS2 modded with an Infinity modchip (v1.21). My PS2 I can play CD and DVD backups fine, but I'm having difficuly with something that I was coutning on this chip working with... My PS1 backups will not play at all. I picked a few at random and the majority will not play...some begin to load up, then after a few seconds the screen with the memory card manager pops up...finally it goes to the red screen that says "please insert a PS2/PS1 CD/DVD" Some games will play, but the screen is blank. I can hear everything just fine, select menus and start up the game...the screen is just black. Other games will load up and play just fine, but I've only found about 2 out of the 20 I've tested will work fine...and the two I tested are pretty mainstream games. Any ideas? I am holding the circle button when booting up to force-boot, but I still get the aforementioned errors...also, I have a PS1 modded and all of the games I've tested work perfectly fine on that.