The installation was fairly straight. I was able to do it myself without too much trouble. With the help of some duct tape and boxes I was able to line up the lip and install it fairly easy. I used 2JR's write up on how to install it, he utilized the stock holes from the Fiesta's original bumper to bolt on the Lip. The holes that come with the lip do not line up with any of the pre'existing holes on the bumper, so some templates and drilling was in order. The sideskirts lined up perfectly and had no trouble putting them on.
There is no difference between the four door and the two door cars.
Here are some photos as promised guys. I wanted to get the lips installed and the car washed in time before the ending of this month's ST of the Month, but didn't have enough time since I just got back from my vacation.