Can't say i know how but it shouldn't be to hard. The guys at steamline carbon do a replacement and make fitting seem/sound easy. http://streamlinecarbon.com/v2/
Yeah it's really easy. I took mine off when I fitted my Milltek. I think there were 3 screw clips and then just normal clips holding it into the bumper all the way around. It's one of those jobs where it's easy once you've done it once. It's nothing difficult though