Let us say that you want to install SQL Server on another host say NewHost but you want it to have the same settings as another host/instance on say ModelHost. In fact, let us say that these are almost identical hosts with similar drive locations and such and you are positive that you want the exact setup on both.
The hard way is to look at what features ModelHost has and try to click through the installation wizard with the correct options selected/input.
Fortunately, there is an easier way to clone an installation. Even if you installed manually using the installation wizard, SQL Server still generates a configuration file with all the settings used (except passwords) for the installation. We can simply use that file from the ModelHost to drive the installation on NewHost
Click through to see where that configuration file is and how you can use it.