TC01
Deity
No, these aren't modding. These are a very few things, and I don't suppose this is modding Civ4.
No, it is modding. Modding by definition is adding new content to something. A scenario is new content. Maybe it's not a new civ, new unit, or new graphic, but it is new content.
That's like saying NifSkope and Paint.NET aren't modding tools because they can only make new graphics, not new units or civilizations. Or Notepad++ isn't a modding tool because it can't make new graphics or compile new DLLs.