there should be a f in recall on that thing are car so well but together
and that thing just does not make sense at all .rick come up with something .

 

I had the same problem with mine. I have an 05 that I just picked up. This helped me alot. Snap in the side straps first, then try to form fit the cover by going back and forth and working it, at the same time when placing the tabs underneath while standing behind the car hit the boot with the palm of your hand with an a down and upwards motion exactly where the tabs are. This seems to work for me. Once you have it the way you like it, I would leave it on the car as long as you can so that it will mold to that shape. Eventually this will get easier. + I try not to store mine in the trunk so it does not loose this shape. Hope this helps.