Creating Scenes Programmatically From A Deployed Build in Unity

This is somewhat of an extension to this question: http://answers.unity3d.com/questions/513801/programatically-creating-entire-unity-games.html I have a client who would like to create an entire game only using XML files. This is how the process should go like: Build & Run a "GameCreator" project. Read an XML file that has the attributes of all the scenes. Create new scenes, fill it with new GameObjects, and load some prefabs. Deploy this new project as a standalone build. All of the above should NOT use Unity Editor. Is that possible ?? What happened is that I used Unity to create a "Framework", and the client wants to use this framework to generate more games without using Unity Editor, only through XML files. I know that one can read XML files with Unity, but how to create a scene, fill it with GameObjects, load prefabs all using a standalone build, not the editor ?? Is there any other way to do what I've described ?? Thanks.