Downloading core modules

[plloyd1010]

First, how you downloaded one of the extensions? If not, you should get the Mentoring Extension and/or the Minefields Extension. Just save them somewhere handy.

Open Vassal and right-click on PG Über. Choose Add extension from the drop-down menu. Navigate to one of the extensions you downloaded, select it and click OK.
This will create a directory under where you have your Über file. You can keep adding extensions like you did the first one. You can also close Vassal at this point and copy whatever extensions you wish into the extension directory that was created earlier.

Now when you start vassal, all the extension in your PG Über will appear if you click the flag beside the PG Über module in the Vassal list. The extension will load when PG Über is started.