I have searched around the Modding forum and could not find answers. So I ask my fellow modders.

How do you spawn units and structures on a custom map? I ask this because I want to create a "Proving Grounds" map. This map will allow me to test custom units and structures without having to research and purchase. I want to load a custom map with the unit and/or structure spawned and begin testing.

If someone has already created one, great! May I have the custom map as well?

Thanks in advance.