There was a map editor, but it was kinda buggy. I tried doing one once where Romulus was put in a corner behind a nebula, and the computer was at a much higher tech level. The computer would always pass through the nebula to get to Romulus, but my cloaked fleet would always decimate their huge fleets, despite that I was outmatched and outgunned. The game could have stood to have scenario maps like that.