[Norfleet]

You could just edit the #defaultmapzoom directive: Dominions II will then automatically magnify the map for you so that the castle icons are bigger or smaller, depending on your tastes. It's impossible to "enlarge" really anyway, since that would involve having to create fictitious data to fill in the problem of "large pixels"...which will just make the map look more like mud instead. This is not really an improvement.