Распаковать в папку portal/maps. Первую карту надо загружать через консоль коммандой map por_facility_v100, а вторая, более сложная, будет доступка в меню "Бонусные карты"
Por_facility:
One of the very first custom maps released for portal.
Rather simple yet difficult map for medium portal players.
Has a lot of puzzles but no directions on what to do next.
Por_facility_advanced:
Here is a more advanced version of por_facility that is in the map list on this forum.
This map has been completely changed but there is still a whole lot to be changed in this map.