hey guys i know i have an A4 but i just got a pair of S4 side skirts and was wondering a couple things about installing them. the sides skirts have a little lip where it meets the door, does that go under the piece on the car where it has the word audi in silver or does it go over that? also for the front and rear, do i have to take the end caps off and then put them back on? i have already checked out the DIY on audiworld but i think it's lacking so more pictures for a first timer. i want to find out before i start taking things apart