How Do I Add Two GameModes?

Hey all!

Basically I bought two different asset packs from the Marketplace. To get them working I need to set Gamemode override to their corrosponding Game type but it only allows you to have one Gamemode override. Does anyone know how to setup two different gamemode overrides so I can use both asset packs for the same level. I have an Quest and weather system asset pack?

Thanks for viewing! =)