The plastic wheel wells came in two pieces. There was a front (the main one) and a trailing edge piece. The trailing edge one was made to cover up the edge of the foam on the trailing edge side of the wheel well. I did not have these so I just installed the wheel wells that I had and put some 1/64" plywood along the edge for cosmetic and a bit of strength. In this picture, you can see that installed, the wheel wells installed and the wing hold down cone in place. Some of the spackling was done here and it is starting to look really nice.
I have video of all of this being done on youtube. I kindof wish that I would have taken more pictures for RCU but is was mainly a video documentary.
http://www.youtube.com/watch?v=oAgUSmGOdS0