Jimmy,
The recommended way would be to upgrade your Media Server, and yes it is very simple just run setup and it will do everything for you.
Once that is upgraded and rebooted you can push install the remote agents out to the other 7 servers. You do not need to do this all at once, but it is recommended to do so. You will still get backups but any fixes that are in the new version would not apply until all agents are upgraded.
Patty