1) You can go to the map properties => Players => [2] => ReservedHeroes => right-click => Add. In the window that appears, create a New entry + any unique name, which will create an AdvMapHero object on the map. For it, you select the Shared hero you need and configure the other fields as you would for a regular hero on the map. But the main thing is to select Shared; then, you can configure the hero as usual through MapProperties. If you don't select Shared or select it incorrectly, the map will crash when loading.