Ok I'll make it piece to piece-difficult english communication D:-
1.Put everything from Winrar's file into the file named my_objects.
2.In the Winrar's file in the things written,theres one file writing this:ObjectPackage1.object
3.the same ObjectPackage1.object you put it in the file that writes ONLY objects.No in a file,where's a space.
4.Go in-game and go in your Map Maker.Go to where you have the objects to put in the map and you'll see a group with the name"ObjectPackage1'.Open it and see there are meshes.
I hope that explains you more clearly