Best of luck. ?
Basically, the expert settings in Magic Dosbox are the same as the normal Dosbox .conf file every Windows/Linux user has to fiddle with. Magic Dosbox makes it a lot easier to set up most games with its UI optioms. DKeeper was only a very weird and special case.
So as a general piece of advice, I’d suggest you read the readme that comes with the Windows version of Dosbox.