Control center is trying to install some packages for properly working network service. You just could specify the source of packages, a CD, DVD, http url, ftp url, online repository... So, just go to source section and make sure there is a DVD source of packages.
Then you could install some packages from DVD via software control section of the control center. When you add "a new connection" just put your install DVD in the DVD-rom and control center automatically will detect needed packages and sources.