Preparing for a network installation

The question I have has to do with configuring a server for a network installation. If, for instance, I want to set the server up as an FTP server, I would copy the contents of the installation media to the directory /var/ftp/pub/inst/. This is simple enough if the installation files are all contained on a single DVD. What, however, needs to be done if the installation files are contained on two DVDs. Do the DVDs need to be copied to two distinct directories such as /var/ftp/pub/inst/disc1 and /var/ftp/pub/inst/disc2?