If you have the instructions they give you the measurements for where to drill the bootlid out. If you dont have them I think I still have mine in my glovebox that I can dig out and write up here for you. Other than that you need:
2x M5 thread bolts about an inch long
2x 8mm spacer/washer (Im sure a flat washer would work just the same)
^^those are the main fasteners for the spoiler, they screw into the brass thread in the spoiler base.
2x Small screws - my kit from Reno was missing these so I just used 2 1cm long phillips head screws
^^ they go into the most backwards facing edge of the spoiler, still from underneath the bootlid
4x self tapping screws with countersunk heads, make sure you buy stainless steel or they will rust. These need to be about an inch to an inch and a half in length
^^they hold the sideplates on