If its an ISO, 7Zip and WinRAR should be able to open it.. just right click and Open with 7Zip or WinRAR..
Or you you can use a virtual CD software.. like PowerISO to mount it in a virtual drive..
I just tried to download it.. but all I get is this screen in Mediafire

..and Usercloud just keeps throwing me to different ad sites when I click on the download link..
.. EDIT: after disabling Javascript for Usercloud, was able to download the file.. but it was just a RAR.. not an ISO..

.. EDIT AGAIN: if you downloaded from Usercloud, you might have gotten a fake ISO file from one of those shady ad sites..
Once you land into Usercloud, disable Javascript in the browser settings and then click the Download button.. that should give you the correct file..