How to install the print shop art cd

Hi. I am a new convert to the Mac world, my son and some friends are avid Mac users. I have had my iMac almost a year, just after my PC blew up! Everything downloaded was fine with no asking for passwords or codes. But, the error message says it won't install Print Shop without Art CD. Then when I try installing the print shop art CD it says application not found. Please post if I have to burn these onto a CD first or not. I do not want to sound like a complainer, but why is there this huge gap in quality graphics software?
