After all of them are turned to the unlocked/open position, gently pull the faceplate up and it should seperate:
Now simply take your rings and pop them on to the left part of the above picture. Mine were very tight and clipped on, the friction plenty to hold them on through anything, however I know some of the rings are a lot looser and might require some creative glueing to get them to stay.
Here's a picture of the rings on just that piece. Notice the Bugatti Veyron Top Gear on the projector in the background. This is a must for this DIY. If you don't watch Top Gear while installing the rings, they won't work.
Now the reverse install. Put the faceplate back in the glass (rescrewing the three thumb screws all the way to ensure nothing moves), then using the torque screws, reattach the back half of the gauge cluster.
Take it back to your car then, slide it beside the steering wheel, push it firmly into it's hole, and screw the top two screws in.
Congratulations, you now have silver gauge rings installed in your car.
For any questions about anything discussed in this DIY, feel free to post a question in our forum and you'll quickly get an answer.