Angela...I am about to embark on the same task and look forward to any replies that you receive. From watching youtube, I learned that it is a good idea to mark, with tape, where the clips are located so efforts to "clip" the molding are concentrated at the right location. Mustangs to fear suggested that the clips be flattened slightly before installation. He explains that flattening the clips makes it easier to "clip" the molding. I haven't done this yet, so I don't know if flattening is a good suggestion or even necessary.
I also learned to use tape around the perimeter. This makes me nervous as I don't want the tape to peel the paint. Fortunately for me, the car I am working on has a vinyl top, so I only have to be concerned about the paint on one edge. However, I can't help but think the vinyl top will pose its own challenges with the extra thickness.
Again, I look forward to any suggestions the experts can offer.
Mark