Ps2 Shark cards???

I have just recently bought myself a ps2 and was wondering is there anyway that i could backup my games, is it as easy as backing-up psx 1s.Another thing was i was wondering if you can get a chip that doesnt effect the inside of your console, like the password/shark cards for the psx. If so could someone give the address of where i could get one from.
Thanks
P.S I did search about this subject but couldnt find anything of any use!