Hey garrettprs, I ran SimConnect.msi, got into P3d, picked the 777 and to my shock, I now have full control and real landing gear.

Thank you so much!

P.S. The installer for -300 expansion module prompted me for the location of the FSX folder. I thought that was strange because I thought I bought an expansion module for P3D. Anyway, if you copy the Prepar3d.exe file as fsx.exe, the installer is then happy to install it as a P3d airplane.