Not sure how often others deal with it, or if it even would make a difference but.
How about an option during the installation routine that asks if it is a Restore of a gateway?
Then you could File-Open and browse to a gateway backup file .gwbk and the installer could then see the modules required, all the config info, and use that as the basis of the installation?
Takes a lot of the legwork out of restoring/duplicating a gateway config.