How can I save the game object as prefabs without using UnityEditor import.

Hi I'm developing a game where it consist of many seen and the character has many transformation going on each scene. Now what i basically want is when I change my character property like give him /her the new hands, legs , dress and vice versa,Next time the player play my game i want the changes to be happen permanently. I've seed some post in the unity forum i.e 1. http://answers.unity3d.com/questions/21666/creatingsaving-prefabs-during-runtime.html 2. http://answers.unity3d.com/questions/29471/how-to-create-and-save-a-gameobject-to-a-prefab-wi.html But all these work in unityEditor and when I try to build for the android or the Iphone my build show error and can't able to build. It says like you are missing some things like some import.