You want to put objects in a map? Is that what you are asking for?
If that's the case, let's say you are going to be editing AH:
Data > world > 42.wld (Open with ShStudio) > and from here on, you need to know your objects. They are under building and shape. Then you have tree and grass. So let's say you want to put a ship in, then you have to insert the .smod in either building or shape, depending on where your object is located. Inserting a new .smod happens with "Insert" and same goes for the coordinates of this object.
Two tips
1) If you want to make an object visible, you must have
1 on Rotation z and
1 on Unknown 2. (Easiest case scenario)
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2) When ever you are going for the y coordinate on Location, never insert the "y" coordinate you are seeing in game. If you do, your object will float in the air. You must always lower the numbers you see as "y" coordinate.