Undo the screws holdin' the aluminium trim around the inside of the window, use a knife to cut away any old sealant from the glass on the outside, take glass out and refit with some new sealant. Ah used a roof and gutter type sealant when ah did mine
Guess so. That's how I did mine. Fitting lock and hinges was straight forward. Never done the wiper motor mind you. Fitting it back on is a two person job to make sure you don't damage the paint.
Then all you have to do is allign the lock and the support bracket. Best to fit the spare wheel carrier and put the weight on it before you do the final adjustments to let it settle in place.