This was my Mom's MBP and she upgraded to an Air and gave me this one - super nice laptop. OSX is great for all the typical stuff, but I also needed my laptop to host a program that talks to my car computer through a special USB interface. The app and the drivers for that are Windows only.
No problem, right? Boot camp to the rescue! I created a windows partition and got to the point where I needed to select the formatting option for the partition - the Boot Camp install guide is very clear - you need to format the new partition. I pressed the up arrow - nada.
It actually took me three days and three different Windows discs before I figured out that my up arrow was, in fact, not functioning. I popped the key off and was able, with a lot of squinting, to see that the underlying connection was broken.
I ordered this part - I used ifixit to get in and replace the HDD not too long ago, and the guide was great. The part came in, and I went to work.
It was all very straightforward
It took quite a while, but I was on call this week and took a support call right in the middle of it. My time from first screw to last was close to three hours, but I think it could be done safely in about 60-90 minutes.
You definitely want to take your time, be organized, and to have the right tools for the job. I did not have a spudger; I used a safety pin, with a magnifier and lots of patience. You need a tiny tiny phillips and a Torx (5 I think), a spudger, a means of keeping lots of tiny screws organized, and a good light. And the guide. The guide really helps. A lot.