Step 2: Take it apart!
When you've got the whole shopping list the real fun begins..the unscrewing!
I find it so much fun just to take apart appliances to see what's underneath.
Make sure to not where you pulled what screw, manufacturers tend to use one size screws in general, but there will always be some deviations.
Firstly you need the front bezel from the screen. Be careful of wire ribbons when disassembling the cover of the screen. Disconnect any ZIF or ribbon cables you encounter and be sure to take pictures before disconnecting (this helps later when putting it back together).
The LCD part is most likely glued/taped to the bezel, so you end up with having to carefully remove it. The best way to do this is with a needle or utility knife. Take your time, because it is one of your more costly parts. Be sure to check if there is no glass plate on the LCD, which can shatter when prying.
Also you need to remove the center bezel from your car, or have the spare one you bought at hand. (second picture)
In the first picture you see my LCD screen with the frame removed and you can also see my barebone PC. I had them hooked up for testing purposes (aka. I hope I didn't wreck it)