For the door is similar to the picture of the socket that I posted. All you have to do:

1- is take out the wedge bulb in to the door.
2- cut one leg of the LED off and solder 470 Ohms resistor to it
3- cut both legs so that they're even
4- bend both legs into the paper clip shape so that the socket will hold it in place
5- put it back to the door socket (if it doesn't light up, take it out and turn it around) and wiggle the LED to see if it will get loose when people close the door (if yes, then take it out and redo step 4)

Now you can turn any wedge bulb in your car to any color

Note: Depend on what kind of LED that you have, if it is narrow viewing angle LED then you have to flatten its head to spread the light a bit wider or you will have hot spot on the odometer LCD and the clock. So play around with them until you see what you like best