Sorry, what do you mean you can't find any reference to Unicom in FSX. If told to tune to Unicom that is what you should do. You won't get 'clearance' from Unicom because at an uncontrolled airport it is up to you to let other aircraft know where you are and what you're doing... via Unicom or Multicom
I mean just that I cant find any reference to unicom in the radio help section of FSX, just looked again. The controller says "Your flight plan has been filed. Contact unicom on 122.9.
I cant see any unicom/multicom band on the radio. How do I contact unicom on 122.9. I'm obviously missing something