The brite work, that is the outside drip molding and weatherstrip channel are two pieces that are held on by screws that are underneath the weatherstrip. Also the drip molding is underneath the weatherstrip channel. First the weatherstriip, then the screws underneath, then the weatherstrip channel and last the drip molding. Everything is sealed to the body with butyl tape.
Once I had all the screws out, I used a heat gun to soften the sealant then gently pulled and pried off the trim.
When replacing, bite the bullet and buy some butyl tape. It's usually called glaziers tape and is available at many large glass supply places. I bought 3 rolls of 1/4 by 1/2 inch on the internet for about $20. Doing the side rails, windshield and rear window trim took about 2 1/2. It's far superior to using adhesive because it has body to it so that you get proper alignment. An adhesive bead will just squish down. You can stretch the tape before application to get any thickness you want, or build up a couple of layers. It's what was used at the factory.
Hope this helps
Terry
64HT