pretty simple.... go in the trunk, pull out clear tabs at all 4 corners of the speaker,push up, turn and pull down through the hole....remount from the bottom using self tappers...if not have fun removing the rear interior of the car.
well, i removed the back seat to do my installs. i dont think theres any other way, cuz the back speaker just doesnt look like it can come out thru the hole into the trunk.