Not sure about a guide but it's really easy.
1. Remove the cover from the rear wiper (it pulls off), undo the nut underneath and pull the wiper arm off. It might be a bit stiff, but gently wiggle it free.
2. Open boot, look inside the two handles and you'll see a screw inside each. Undo the screws and give the plastic a good pull and it will come out.
3. You'll be able to see the motor mechanism, undo the plug and water pipe first, then undo the 3 bolts. The motor should then pull off, be careful to not lose the rubber grommet from the glass.
4. I plugged the washer pipe with a screw, then used a new rubber blank to fill the hole in the window. Reattach the trim inside the bootlid and you're done.
