First thing that needs to be done is enabling the SDK. This will need to be done for every variant and sometimes even after a PMDG upgrade if it resets the files.
PMDG Needs the SDK Enabled!! Do This First for all 777 Variants!
For the First Device Tutorial Regarding the PMDG 777 I decided to use an Airbus Setup :). The TCA Airbus Captains Pack! This is just what happens to be at my desk vs in the main simulator.
Thrustmaster TCA Airbus Captain Pack and the PMDG 777