FIRST make sure you have the base PMS GTN 650/750 package installed. If can be found at https://pms50.com/msfs/ 


Installing the required CowanSim PMS GTN Package  
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1. Extract the "pms50-gtn750WTT-CowanSim" folder directly into the Community folder.
  
⚠️ Important: Make sure you do not end up with a double-folder structure.  

It should look like this:  

Community\pms50-gtn750WTT-cowansim-[helicopter]  

NOT like this:  

Community\pms50-gtn750WTT-cowansim-[helicopter]\pms50-gtn750WTT-cowansim-[helicopter]  

2. Start Microsoft Flight Simulator.  

3. In the cockpit, use the GTN OPTION switch to activate the PMS GTN650/750.  

- If the PMS GTN software is installed correctly, it will appear and function automatically.  

That’s it - once in the Community folder correctly, the PMS GTN will be fully integrated with your CowanSim helicopter. 
 

Default “Community” Folder Locations
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For Windows Store Installations:

    MSFS 2020:
    C:\Users\[Your User Name]\AppData\Local\Packages\Microsoft.FlightSimulator_8wekyb3d8bbwe\LocalCache\Packages\Community
    MSFS 2024:
    C:\Users\[Your User Name]\AppData\Local\Packages\Microsoft.Limitless_8wekyb3d8bbwe\LocalCache\Packages\Community

For Steam Installations:

    MSFS 2020:
    C:\Users\[Your User Name]\AppData\Local\Packages\Microsoft.FlightDashboard_8wekyb3d8bbwe\LocalCache\Packages\Community
    MSFS 2024:
    C:\Users\[Your User Name]\AppData\Roaming\Microsoft Flight Simulator 2024\Packages\Community

For Custom Installations:

If you chose a custom installation path during setup, your “Community” folder will be located within the directory you specified.