You should be able to do it yourself. There are a couple of screws in the rear fender and you may have a supporting bracket for the bottom of the GT cover. The rest you'll access from inside the hatch area. Remove the two interior panels along the back of the hatch. You may have to loosen the two interior side panels so you can access lower fender well area. The bumper cover has a support bracket with studs that go through the cover and into the hatch area. All you have to do is remove the nuts and the fender srews and pry it away from the body. This may not cover everything but I hope you get the idea. When installing the cover any place the studs penetrate the inside should be sealed with strip caulk. Either put some around the stud or on the bottom side of the nut before you put it back on.