As I don't use ISO's im not sure if this is correct or not.... I beleive you have to use a program like Isobuster to extract the files from the ISO and then use another program like Primo DVD to burn them.....
Just a side NOTE: Always try to use a original WORKING game to burn from.... This way you will KNOW EXACTLY what you have instead of downloading something..... I heard TOO many horror stories about "I downloaded this game and it won't work"... Then you have all the wasted time and effort......
Just my opinion....
Also if anybody deals with ISO files.... Please post on how YOU burn them to help him out.... Thanks.....