The above notes are mostly outdated.
Newer DVA-Profession installs are done using preconfigured VirtualMachine images.
Nevertheless, here are some more recent notes:
After first boot: Change the hostname
With existing setups, it's possible to use "create_thin_copy" to spawn new Nexus instances off existing "/opt/dva-profession/workflow" configuration, by using rsync (over SSH) as transfer protocol. This can be done even while the source Nexus is in use.