New Campaign and some questions

Hello, I want to add a custom map to my scenario, but I do not where to place the map file. I put in in the main AOE 1 directory in steam but it doesn’t appear. Anybody knows where should I place it?

Anyways, here’s my scenario, used some tricks and tips from the old school AOE designers, hope you like it and please report any problems you encounter: Mods Single - Age of Empires