That is the traction control. If you switch the TCS off via the button left of your steering wheel, and mash it around the corner it won't display that anymore.. and you'll probably get some fish tail action going
1. Remove the one screw under the ashtray.
2. Remove the center console (using a soft cloth over a flathead screw driver, push underneath the side where there is the handbrake and it should pop out.
3. Remove the aircon vents (using a soft cloth over a flathead on the left hand side, push in and pop out)
4. The cage is now exposed. Unscrew the four screws and pop out cage as whole.
5. Remove the headunit, and connect up. (you'll need a nissan diversity to standard antenna adaptor, and you can get the wiring harnesses from aerpro if you don't want to solder and chop wires.. see my other thread).
Get the wing off totally. You'll see how bad it is without the sides, it looks a too short to look decent and it ends too abruptly.
See the other thread about how to remove the spoiler, there will be extensive panel repair and respray work involved.
Other than that, enjoy your ride, it looks great mate.