1> Pull out the little trim pieces between the HVAC panel and the top. For a Post-98, I believe this is the piece that says "Contour" and a couple pieces on each side. For a Pre-98 this is the clock and 3 pieces of plastic. There's another above the power mirror control on the left side. They just pop out. Use a thin flat-head screwdriver with a piece of soft fabric under it just in case and gently pry them up.
2> You should uncover 3 screws. 2 on the right side of the steering wheel, one on the left side. They're just phillips heads. Unscrew those.
3> Now, look above the instrument cluster. There's 2 holes in the top of the bezel with 2 more phillips-heads deeply embedded in there. With a small phillips head you can get to them, but to me, getting them out (and back in) was the hardest part of the entire install.
4> Lower the steering wheel and the entire bezel should lift right out.
5> You should now see all sorts of steel bars, empty holes were your vents are, and right in the center is your instrument cluster. It has, I believe 5 screws in it. Unscrew those.
6> Pull the cluster forward and reach behind it and unclip the 2 wire groups that are plugged into the back of the board. Might take a little persuasion, but it's not that difficult.
7> You should now be able to freely remove the entire cluster and do with it as you please. You should probably take it inside to a nice, smooth, clean surface.
8> Now for the the part that rivals getting those damn screws out as the hardest part of the process -- prying open the cluster. Just go one clip at a time, sliding something in between the clips so they don't close right back up on you when you move to the next one. You should get the 2 halves apart in a few minutes and you'll be able to access the faces.
9> Just slide the overlays over the existing needless and glue or tape them down to the faces. Sometimes you will need to remove the needles. I can't tell you how to do that, but it does add a step that I would try to avoid if possible.
10> Once you have to overlays down and secured, simply reverse the entire process to reassemble the dash.
11> Wiring is relatively simple. It involves simply splicing the red cable from the overlay transformer into the brown cable (maybe red on some 'Tours) of your headlight relay. Ground the negative somewhere -- a bolt on the steering column is the best place.
12> Total time to complete project, even if you have no idea what you're doing (like me when I did it), maybe 1.5 - 2 hours.
Here's a version with a couple pictures, but not as many step-by-step instructions:
http://www.fordcontour.org/FCOForums/index.php?act=ST&f=32&t=1474&s=3c6b80faab045dff1f4bce63dad0b20b
And Note, as the pictoral how-to states, do NOT touch the back of the switch. You will hurt yourself.