General Looking to launch apps using buttons on bluetooth device

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http://androidforums.com – I recently installed a Grom aux/bluetooth device into my honda accord. I find its rather neat not only can I make and take calls with the device, but I can stream my music over bluetooth and control the media player with the steering wheel controls. Its nice not having to take the phone out of my pocket when in the car. My issue is that the button on the factory stereo which acts as the call button resorts to the voice dialer function where I would much rather use google now. Pressing various buttons on my stereo I have found two buttons that register in android when pressed but as far as I ca (General)