Those are jobs that you can easily do yourself, and I do mean easily. I followed instructions similiar to these for my backup camera install. I had half the cars interior out and ran all sorts of wiring and did it without a hitch. If you knew how non mechanically inclined I was and how I never do stuff like this, you appreciate how easy it is to follow instructions like these. Seriously, have a look and do it yourself.
GTR Button Swap Out
Believe it or not, the shift knob just unscrews. Lots have reported they need to cover the knob with a towel or something to protect it, then use grips to twost it off. Depends how much locktite you haue on it. But it's a simple unscrew and replace.
Comments on the shift knob.