I have heard that its a right bastard! Easier on a hatch than a saloon. I would imagine that its a case of pulling off trim lining around the doors, popping out the courtesy lights in the roof, removing the rear panel on the roof just inside the hinge point of the hatch and removing the sun visors and interor roof lamp and roof bin.
Don't forget to 'chock' the front wheels and also, refitting is the reversal of the above!! rofl..
Good luck! thumbup