ISO help help please
 

Hello there...ok I must be very retarted...I have tried and tried to open an iso file...I have toasted it till it burned with nero! Each time all I get is either a bunch of files OR another ISO file. All I want to do is to have the program run for me like a normal program:-( Can someone give me step by step instructions on what to do with this ISO file so that it will actually turn into an application program that I can run on my computer. I have a mac running Tiger, but I can also use it on a PC if Mac is out of the question...please please someone take pitty on me and help me out!
Witznd