Thanks, I finally got it to work. For those still struggling: Find it on the Google Play store (get the free "demo" version [1] ), sign up for the Beta channel, install the beta, then to configure it for an i-MiEV or clone, go to Screens|Settings|VehicleSettings|ECUsettings and set Vehicle...
Brilliant work! I'd started researching this exact same idea a couple of days ago, but you've got a lot further than me. I figured the best place for a switch is actually on the left footrest—essentially a foot switch akin to a clutch pedal. And it means you don't need to take your hand off the whee...