Yes, that's the standard procedure. MySQL isn't running on the x86 and Sparc lines by default. And PhpMyAdmin also doesn't enable it by default since PhpMyAdmin can be used to just work on remote servers, not only on the ReadyNAS itself. Since we don't know what PhpMyAdmin will be used for, we don't enable MySQL when the add-on is installed. That said, would you think an option to start/stop MySQL would make sense for the add-on?