How flexible was the UI modding in Supreme Commander?

I remember there being UI mods where you could do the following:
1. Make, save and deploy build templates of different buildings
2. Do something with radar circles, display them with a toggle key?

What else could you do with Supreme Commanders UI?

Neither of those were mods - bog standard features that shipped with the game.

I remember there was this awesome mod for vanilla SupCom, and I was really sad that it wasn't available for FA. Maybe someone can refresh my memory. It was the one big popular UI mod that let you make your own custom setup, move the various elements around, create your own custom bars n' such, etc.

Anyway, I don't know how that one was made, so someone more code-handy could probably tell you, but that gives you an idea of what you could do with SupCom's UI.