I NEED HELP! PLEASE HELP ME!!!!!!!!

hello, i bought a mod chip so that i could burn playstation games but i tried but did not succed! could you help me? My friend said that i needed an ISO but dont know how to get them and i do not know what they are,I need help because I need to make a backup of some games. Once again i really need your help! COULD YOU PLEASE REPLY BACK ASAP, SO I CAN HAVE SOME BACK UPS BEFORE MY BROTHERS BREAK THE ORIGNALS!