jsibs

I am trying to get my Toshiba back up and running and I am wondering if I can complete this at all. I have downloaded from Digital River the Win7 install .iso but now I am stuck. I am on a Mac and downloaded iSkysoft DVD creator to burn the .iso to a disc to boot up the install of Win7. I cannot upload a .iso to this creator to get it to burn. Possible or am I just all wrong. Jason