There are 2 black sponges (or whatever those things are called) underneath each pickup, working as springs.
Since the Tone Zone and Air Norton are very thin pickups, you will have to cut those black things in half. I had to do that to install my Evos, and iirc, the D Sonic was the thickest pickup I've seen. Considering that the Crunch Lab is similar, be prepared to do the same.
That's the most complicated part of the process but it's worth the pain.