I just installed a set today. It was easy. Set the top and bottom rubbers in their places, spray some silicone lube on the whole area, keep a rag there to wipe up the areas that you don't want the lube. Then put in the brass U thingie and push in with a flat head screwdriver, then take some needle nose pliers and grab the curved edges and push them up/down into their respective places. When you close the door it will settle them and spread them accordingly. You can also use the needle nose pliers to spread the brass part back out then close the door.
Easier than you think.
I did not change the shape of the rubbers at all. Put the rubber pieces in with the curved side up on the top piece and the curved side down on the bottom piece.
Rex