According to this photo there are Deformation elements that need to be replaced, also probably the "mount, bumper, front,lower" (position4) also needs to change. I have a sport line that I am putting this bumper on and it's not that easy swapping, my ducts do not align too well with the supposed holes where they should be mounted on.
Also, what about the shroud for,the radiator in the right wheel well? If you have pictures of all the ducts on the car with the bumper off, it would be very helpful.
http://realoem.com/bmw/showparts.do?...03&hg=51&fg=15