YUPZ!!!For IR to work nicely, it needs to be in direct sight of the receiver. That's what mostly your TV controller, AC controller is using. What I think can be done to make it stealthy is you move the IR sensor away from the unit and extend it to on top of the dash or some place that it can be detected. By doing this, your actual unit is hidden from sight and the only thing showing is the IR sensor.
This is what I saw some of the Japanese ETC unit doing.
Actually, my 2nd step was to rewire to my existing ETC units... Since it is useless now. Will be using the IR or the casing to fit in my Smart Tag IRs... :P
But I will post up a 2 stage guide.. one without ETC and with ETC... :P