You're on the right track. I installed that head unit into the same car a few weeks back. I wasn't very ICE-savy when doing mine but I managed it just fine. I didn't buy a signal booster so can't comment on that - its quite cramped back there but you should be able to push it into one of the side areas.
- You won't need a PAC-ROEM-NIS2
- If you want to feed the USB cable into the satnav cubby - as you say - you'll have to cut a hole into the plastic case. I didn't want to do that so I fed my USB and AUX cables into the armrest cubbie through the central bulkhead.
- Once you've removed the centre console, you detach the factory headunit from the back of the console, you'll see that once you've got the console out. Now by some bad luck either the Bose unit is too big or the Pioneer unit is too small. The fascia plastic Pioneer provides is fine if you install it with a cage - but without it you get supplied a thin piece of black plastic trim you are supposed to cut down to size. Mine didn't fit around the pioneer headunit snuggly, so didnt bother with it - I'm not sure what Pioneer are playing at, maybe I got given an incorrect piece of trim. Even using the fascia trim from Sextons leaves a considerble gap and I'm still not sure how to fill it.
- Lastly, the thing I got confused about was the steering wheel controls, you will see 3 cables (as shown here: http://i166.photobucket.com/albums/u94/ ... n/Pic1.jpg in purple)
That will need to be spliced into the 3rd stalk - the pack contains a wiring guide of which cables to splice together, they recommend soldering, but that's highly impracticle while sitting in the car - so I just bound the wires together and put some heatshrink around them, electrical tape should suffice though.