What you essentially want to do is to install packages stored in a local, custom repository, or possibly two, local, custom repositories. I am currently using two, local, custom repositories for installing packages. One repository is stored on a 16 GB flash drive; the other resides in </home/rg/Repository/pclinuxos/2007/RPMS.special> on my hard drive. For more information on this, see my post:http://www.pclinuxos.com/forum/index.php/topic,66149.0.html
You might find flash drives to be more useful and efficient for installing packages than DVD discs. Just plug the flash drives in and you are ready to go. No inserting and ejecting DVD discs again-and-again.