The install instructions are at the Ford Racing Parts site. I didn't install the STS myself since it was at Rich's for a boatload of other stuff, but it is my opinion the hardest part is the R&R of the center console tunnel cover. I got some very good instructions from Rich on how to do that for another reason and if you've never done the center console before figure about 2 hours to do a really good job, take your time and protect everything. As usual with such things on the reinstall I got a few things out of order and had to back up (which meant removing 8 screws). Also, be absolutely positive to check the fit of the shifter rubber cup before screwing down. Mine got jammed and I had to back up again.
The shifter install is another 1.5 hours (my estimate).
Perhaps Torrie or Rich can comment.
Did this topic start a Santa Christmas List for some people?
I think you won't regret the change, and most likely will regret having not done it. What POs me more than anything is that the car didn't come with it originally.
Now the shifter I want is the one in the Porsche video.