You should go to the 2002 faq site . I wrote a page on installing these weatherstripping pieces. especially where they come together. Basically , where the seals overlap, they should be installed overlapping each other but if you just do that, they are too thick and the sunroof will hang up. Once you have figured out how long they should be and have trimmed the ends there is one more step to do before gluing them in. If you notice, inside the ridge of the new seal, it is a small rubber tube that runs inside the seal, what you do where they overlapp, is to pull about one inch of the rubber seal out and cut it off so there is no rubber in the last inch on the seal for both pieces ( when you pull the rubber out, and have cut it, it will pull itself back into the seal.) Now for the last inch of each seal no longer has the rubber in it and you can glue first the back seal first and then the front seal They should cross each other slightly at an angle and now, with a bit of rubber gone, they can be both glued down and wont interfere with sunroof. I will look later for some pictures later Hope you can make out what I am trying to convey here.
Thanks, Rick