I have made a basic and hopefully simple to read step by step checklist for the PMDG 777-300ER, Just follow the flow 'Left column - Right column' in each section, This is made from watching several tutorial video's and read other checklists and put it all together in one doc.
Please keep in mind things may not be done in the most irl realistic way (or the way your used to doing it) all the time, but these flows work to get the plane set up, in the air and back down again, I have not encountered any issues when following the list.
If you see any issues with the Checklist please feel free to reach out to me so i can rectify any issues.