Open scene and load prefab

I want open a scene with an editor window and load some prefab from my resources folder in it.
I can do this easily ?

I know I can :

EditorApplication.OpenScene( sPathScene );

but after will ‘Instantiate command’ work with a gameObject load from my editor window ?

private void InitScene()
//Made this dynamic after to generic usage, user choose his scene name in Wizard window and create it for all others baking
string sPathScene = “Assets/Scenes/BakingScene”;
EditorApplication.OpenScene( sPathScene );

		//Init all the gameobject from our window in the scene (Transform must be set in the prefab before import them in editor window )
		foreach( GameObject go in LightMapUvMeshsToGenerate )