Create DVD installation medium
The ISO file in the installation directory for OSC is a so-called hybrid image. It can not only be copied onto USB storage devices but can also be used to create a bootable DVD.
Burn ISO Image (Windows)
In Explorer, open the directory that contains the ISO file.
Right-click on the ISO file.
Select Burn disc image.
Burn ISO Image (Linux)
Under Linux, various burning programs with a graphical user interface or for the command line are available.
The Ubuntu Wiki explains how to burn an ISO image onto a DVD using a number of programs.