I use a 2 screen width display of Diadem, usually have view pane on left, report and a slim navigator on the right. (side by side)
I can save the setup to the .ddd file, but this file only remembers the 2 screen width, doesnt retain the pane layout.
Id make a script if i knew what commands for it were available.
Just seems the .ddd file is a bit limited, unless of course its something to do with our IT security blocking it.