Here it is in a nutshell:
1. Open the glove box, empty all the stuff out of it
2. Press the sides of the glove box in to get past the catches, pull glove box down
3. You will see 2 screws holding the center panel in, remove them
4. You will see 2 screws under the center panel, remove them
5. On the drivers side, you will see 3 screws holding up the driver side panel, remove them
6. Remove the drivers side panel
7. You will then see two more screws holding the center panel in, remove them
8. Remove the center panel and the plug on the back of the cigarette lighter
9. Looking up at the bottom of the radio, you will see two 8mm bolts (silver) remove or loosen them
10. Pull the radio out and remove all plugs
Just be careful if you have factory keyless entry because it is controlled by the headunit (though there is a workaround)
Hope this helps