Best practices for config files

[Scott Haneda]

What are the best practices for providing config files with ports?

I am working with a friend to make an all in one ISP solution, email,  
dns, database, webmail, etc etc.  Sort of a cpanel done right on the  
Mac.

Let'stake Roundcube for example, there is not a port that I can see.   
This is a basic install, it is just a download, uncompress, and move  
to location.

That would cover the default port.  However, I want to make a custom  
config file, that is a little more tailored to the ISP solution port  
we are working on.

Do you use a variant for this, port install roundcube +custom-config  
or similar?
--
Scott

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