Well it nearly worked.
There is definitely some issue with loading plans into the CJ4, it sort of worked with a plan from LittleNavMap but messed up the last few legs as the waypoints were missing, but the plan from P2A only loaded the departure and arrival airports, no rote at all.
I entered it manually just to test but even though I got a verified and filed flightplan in P2A, it refused to talk to me. I tried many messages, and the most i got was “Assigned Ctrllr: Tower on xxx.xx” in text in the msg box, no speech at all.
I did the flight manually anyway just because 
Went back to the world planner and then ATC starts yabbering on, speaking all the answers to the many messages I passed!
Now, I can’t figure out why it will not speak in the cockpit but will in the menu screen…