cmytoy, welcome to the forum. I think the i-MiEV is a perfect security patrol car, unless you expect more than about 50 miles/shift. It's silence for running around at night will ensure minimal disturbance in a neighborhood.
You do realize that full power is still available in ECO if you stomp on the accelerator?
Is your intention to simply maximize driving range? Are you on level ground or a hilly region? - my reason for asking is that B mode can be beneficial if judicially used.
To answer your question, I don't think anyone has messed with the mode selector switches which are actuated by the 'shift' lever- we really don't call it a transmission as the car has none.Edit:
I'm wrong - it is
called a transmission and it has a geartrain, but nothing that 'shifts'.