Hello Matthias,
Maybe you can change the default that vdradmin will read the configuration from /etc/vdradmin; for the people who install the software with your installscript nothing would change or?
But this will break things for users who install several VDRAdmin-AM releases, e.g. for evaluating new (beta) releases, who don't want to modify their "main" VDRAdmin-AM's config file. So it's not likely to change.
Regards, Andreas