Pretty easy really. Once you have the cluster out of the car, pull the clips off of each end, pop the front cover off, then take out the screws on the back of the cluster. The back will come off fairly easily (slides straight up). You will need to have the cluster face down and you need to be careful not to move the needles on the gauges. The broken pin comes out easily and the new pin goes in the same way the broken pin came out. Slide the rear cover back in place (the openings for the harness plugs can sometimes fit really snug into the openings). Once it's fully seated, put the screws back in, flip the cluster over and reinstall the front cover (just snaps into place) and reinstall the clips on the ends.
You do have to hold your tongue just right when pulling the cluster apart and putting it back together.
