Usually if I have to install something from an iso file, I just burn it to a dvd and install. But this one is too big for a DVD, so I am thinking if there is an easy to use free software that install from an iso file directly.
Give this a shot : http://download.cnet.com/Virtual-CloneDrive/3000-20432_4-173879.html After install, simply "right click" on the .iso file and "mount" on Virtual Drive...
You can make a bootable USB stick from bootable ISO images. This is faster than a DVD. Google "burn iso to usb stick" and take the answer that fits to your operating system.