It is literally a 10 minute job. Just take care taking out and putting back in the center console if this is your first time. On the front of the shifter surround there is a piece that sticks down, this need to locate in a hole that keep the shift surround centered. It is very easy to break off if not careful.
Read the attached instructions on console removal, http://g35ipod.com/installHW.php?skin=1&src=mp3car-sig, part 17-20 are the relevant ones.
Cheers
Andy