Adding a Character Controller using c# script

Hello,

I'm trying to get a FPS controller to snap onto and off of any model on I have on my little chunk of test terrain. The FPS controller works great if you add it to a model and then adjust it manually in the window, but when you use addcomponent it seems to have some issues.

1) Model has to be far above terrain or it just falls through. So the model is floating and moving way above the terrain. 2) camera is at the models feet. 3) can't move the components or it just moves the model so can't figure out how to move the camera to face level.

Any ideas?

 using UnityEngine;
 using System.Collections;
 
 public class ToonControl : MonoBehaviour {
 
     GameObject small;
     GameObject medium;
     GameObject large;
 
     // Use this for initialization
     void Start () {
         small = GameObject.FindGameObjectWithTag ("small");
         medium = GameObject.FindGameObjectWithTag ("medium");
         large = GameObject.FindGameObjectWithTag ("large");
     }
     
     // Update is called once per frame
     void Update () {
     
     }
 
     void OnGUI () {
         GUI.Box (new Rect (10, 10, 120,110), "Possess Minion");
 
         if(GUI.Button (new Rect(30,40,80,20), "Small")) {
             camera.enabled = false;
             small.AddComponent<Camera> ();
             small.camera.tag = "MainCamera";
             small.AddComponent<CharacterController>();
             small.AddComponent<MouseLook>();
             small.AddComponent<FPSInputController>();
         }
 
         if(GUI.Button (new Rect(30,65,80,20), "Medium")) {
             camera.enabled = false;
             medium.AddComponent<Camera> ();
             medium.camera.tag = "MainCamera";
         }
 
         if(GUI.Button (new Rect(30,90,80,20), "Large")) {
             camera.enabled = false;
             large.AddComponent<Camera> ();
             large.camera.tag = "MainCamera";
         }
     }
 }