nope, the tweeters just push in, so to take them out by putting a small screw driver to their edge and pry them out, they will pop right out. The problem you will run into is that your door speaker and dash speaker are in series and when you disconnect your dash speaker the door speaker on that side is going to stop working.
Also, I removed just about everything from my dash without taking it out. The dash vents you can just break up and pull/pry out, and the new ones should just snap in place.