Steering Wheel Controls

So, week 2 with the bummed foot and ideas are brewing. At first, I was going to try this on my own but honestly, I need some help. I saw this scan gauge on the internet

and was going to be boring and put it in the cigarette lighter/ashtray door under the a/c unit. Then I got to thinking about it and decided it would look much cleaner/cooler if I got the gauge, tore it apart and had it displaying on the instrument cluster in place of the digital speed/ gear select indicator display. Unfortunately, I can't just outright remove the LED display because it also has the turn signal indicators and without those I can't pass a state inspection. To work around this, I was planning on buying the gauge (it is a 2 1/16" diameter gauge with a 7/8" diagnal size display) removing the casing, and placing it over the LED display while still having my turn signals visible. I would like the finished product to look like this:

On the gauge, there are two buttons that you push to toggle through the data readings, one button is for the top half of the display, the other for the bottom half. If I tear it apart and have it up in the instrument cluster, I need a remote switch that can do the toggling for me and I was thinking the talk/end call button on the steering wheel would be the idea choice. So here is the information I would like to know:

1. Does this sound like it might work?
2. If so, what are the color of those wires for the talk/end call switch?
3. Is there any switch or error messages that might come up if I cut those wires and use them for this application?
4. Does anyone have their dash apart and have the distance between the turn signal indicators?