I just finished the Pro-package install myself. I texted CGW only about the Hammer pin, I was wondering if I was going to maul anything with the amount of force required to seat that pin. After being told that "It's a snug fit", I just smacked it in. Actually, the pin went completely in, rather easily, from one side. The other side went in easily until you got to the center, then it met quite a bit of resistance.
I would say that if you have some mechanical aptitude, that you shouldn't be intimidated with doing this job. The roll pin punch that was the best fit was a 3mm, and I used that the most.
Otherwise, between the various You Tube videos, it shouldn't be a problem. But it does take some time. So be patient.
Just to have them available:
CZ P-09 Walkthrough disassembly and reassembly
https://www.youtube.com/watch?v=WGMnbeCv4gAP-09 CGW Hammer Kit Install
https://www.youtube.com/watch?v=ChRsfL_xyHsP-09 Decocker Spring Installation
https://www.youtube.com/watch?v=CT0gMIQW-H8