its not rocket-science, jsut a pain in the ass.
Get a small screw driver, and plyers (for the button). I had my backseats taken out at the time that i put in my rear speakers so idk how much they get in the way, but i bet they would. just ley em down like he said and work one side at a time. Grab the side panel, pull it towards you. hold that side while pulling the rear deck flat out and up to pop it off. rinse and repeat for the other side. reverse to put it together.
Wam bam thank you england lol
btw, i didnt do half the taking apart that the link he posted did. but i did run the risk of breakin the plastics when i pulled on it