You will notice that all scenario files are within the game folders? If you sort the folder, "by name", the scenario's files should be listed together in alpha order.
Each scenario should have a ".scn", ".org" and ".map" file. If the designer created a picture to go along with it there will be a ".bmp" file. Also designers can sometimes add instructions that are contained in a separate "wordpad/notepad" document of the same name as the scenario.
Ie. "EdS.bmp", "EdS.doc", "EdS.map", "EdS.org", and "EdS.scn".
When I download files I usually zip them and then open the zip into the corresponding game folder.
Hope that is what you want?
HSL