SE7EN3S

I GOT MY XENON SIDES SKIRTS... AND READ THE DIRECTIONS.. SEEMED IT WOULD BE EASY! THEY SOMEONE TOLD ME THAT THEY INSTALL OVER TOP OF MY FACTORY SIDES. although they did not slide back under the door all the way down the car. they sent me 3m tape and im not sure if i tape the zenon to the factory side skirt and reinstall... or if i should tape the zenon sides to the body(underbody) of the car. any helpful hints would be great... thanks==josh