I see you don't suggest mounting the dvd via NFS, what are your concerns, what are the issues, etc. I have three servers in different locations and it would be easiser to upgrade from a single location via NFS. What suggestion do you have?
Installing from NFS is problematic if the network is slow or unstable. Disconnections, drops, etc. can corrupt an LMS installation (or cause it to lock up).
Instead, you can copy the contents of the DVD using tar, then copy the tar file to the remote servers, extract, and install locally. The command to tar the DVD is:
# cd /cdrom/cdrom0
# tar -Ecpf /path/to/lms.tar .
Then, to untar the file:
tar -xpf lms.tar