Removing rear window - F78


Hi All,

My Fourtrak back door is in a shabby state, the drain below the window rubber closest to the door shut was blocked and subsequently rusted a large area of the back door, to the extent that the window channel has corroded and I'm getting a lot of dampness inside and the inevitable wet dog/old slipper smell with it.
Can anyone shed some light on the easiest way to remove and re-fit the rear window so I can do some re-constructive surgery on the window channel?