If you have backup copy of your installation media most likely it is in ISO format.
You can burn it to a CD/ DVD or extract it and use it for installation.The other option is to use free DAEMON Tools lite program to attach the ISO file as a CD/ DVD.here is the link: http://www.disc-tools.com/download/daemon
You can burn it to a CD/ DVD or extract it and use it for installation.The other option is to use free DAEMON Tools lite program to attach the ISO file as a CD/ DVD.here is the link: http://www.disc-tools.com/download/daemon
I recommend selecting only the DAEMON Tools Lite Core Files during the installation.