Hi Chipp - Hide is not exactly what is called a "Command" in MoI since you can run it while in the middle of an already running command. So to invoke it involves a slightly different method of putting in some script code in the shortcut key rather than putting in a command name.
You must have the 2 files RingCircle2.htm & RingCircle2.js inside your Moi commands folder!
you can call it by press Tab and write ringcircle2 (Capitals are not obligatory but space forbidden)
or make a shortcut!