I think your get away with just removing the top piece of trim which covers the top of the rear storage, then the long piece of trim in the boot... I think that reveals the parcel shelf.
I can't remember exactly though so don't take my word for it, someone will be able to tell you though i'm sure
Edit; after looking at a photo I have of the boot, it looks like alot more then just un-clipping some trim.
have fun! :rofl: