Just go on each of the zipped files and take all the objects/meshes.
Basically Basic ring goes to Feral Heart>Media>Objects>Shapes
MainLand goes to exports
Oakbark, rock tex, westfallchurch and young_oak_tree go to Feral Heart>Media>Objects>My_objects.
but you don't just shove the whole zipped files. You have to get all the meshes into the correct files stated above. So meshes go into the My_objects.