Ok the tools I used were limited (yes I need some decent tools). Anyway.... Spoiler (£19.96 from Seat), screw fixings (4mm Zinc screws and washers) from B&Q, Drill and small bit for the pilot holes, some tape to hold it in place (or a mate) and about 3 hours of your time.
Start by offering the spoiler up to the underside of the car (note I used the kerb again, others might want to jack the car). You will notice straight away that the spoiler needs its ends trimmed and shaped, and that the middle legs need to be cut down.



Grab your tape and fix the spoiler in place. Then using the drill make a start and drill your first hole and screw in.


I would note that as you put more screws in that the spoiler does not want to go round the corners that well. I would suggest that you stick it in a hot bath to make it more supple. Finish off all the fixings and your done.



Thanks,
Craig