Placing a pre existing script into a pause menu

EDIT: Sometimes it just pays to know your limits. I had hoped to use the following code via my main menu, but that's not working out, so I'm hoping that someone might point me in the right direction for a much simpler question. The following js contains options to both save and load. Works great. Right now, I have it attached to my main camera. (Also had it attached directly to my player) Obviously, with it attached to the camera it is on the screen constantly, which I don't necessarily want. Am thinking of either attaching it to a pause menu, such as the one found here, or making the gui included my pause menu, but don't quite know how to do that. (strange, making a pause menu from scratch seems easy enough from the tutorial, but I don't know enough yet to incorporate what I've already found into a menu. Any help, as always, is appreciated. God bless.

 import System;
 import System.Collections;
 import System.Xml;
 import System.Xml.Serialization;
 import System.IO;
 import System.Text;
 
 
 
 class DemoData
 {
     var x : float;
     var y : float;
     var z : float;
     var name : String;
     var experience : float;
 }
 
 class UserData
 {
     
    public var _iUser : DemoData = new DemoData();
  
    function UserData() { }
 }
 
 //var target: Transform;
 
 //var generalWidth = 50;
 //var userHeight = 50;
 
 //var playerHealth = 1000;
 //var MaxPlayerHealth = 1000;
 //var playerMana = 1000;
 //var playerEnergy = 100;
 //public var playerDamage = 10;
 
 
 //var playerCurrency = 5000;
 
 var playerPositionX = 0;
 var playerPositionY = 0;
 var playerPositionZ = 0;
 
 //var damageNpc = 1;
 
 
 
 
 //Variable For Experience *******************************************************
 public static var curExperience = 1;
 var ExpBarEmtey = 0;
 var ExpBarCur : float;
 var screenHeight : float;
 static var ExpPart = 25; 
 var curLevel = 1;
 var LvMax = 0;
 
 var Lv0 = 12;
 var Lv1 = 18;
 var Lv2 = 28;
 var Lv3 = 42;
 var Lv4 = 78;
 var Lv5 = 156;
 var Lv6 = 330;
 var Lv7 = 800;
 var Lv8 = 1760;
 var Lv9 = 4110;
 var Lv10 = 8670;
 
 //EndofExpVariables *************************************************************
 
 //Saving Variables **************************************************************
 private var _Save : Rect;
 private var _Load : Rect;
 
 private var _SaveMSG : Rect;
 private var _LoadMSG : Rect;
 
 //var _ShouldSave : boolean;
 //var _ShouldLoad : boolean;
 //var _SwitchSave : boolean;
 //var _SwitchLoad : boolean;
 private var _FileLocation : String;
 private var _FileName : String = "SaveData.xml";
 
 //public GameObject player;
 var player : GameObject;
 var playerName : String = "Default";
 
 var MyStyle : GUIStyle;
 
 private var myData : UserData;
 private var _data : String;
 
 private var VPosition : Vector3;
 //EndOfSaving Variables *********************************************************
 
 
 function Awake () { 
       // GUI for the Save/Load
       _Save=new Rect(50,180,100,20);
       _Load=new Rect(50,210,100,20);
       _Name=new Rect(50,240,200,20);
       _SaveMSG=new Rect(50,120,200,40);
       _LoadMSG=new Rect(50,140,200,40);
       _NameMSG=new Rect(50,180,200,40);
        
       // XML Save/Load path
       _FileLocation=Application.dataPath;
       
           
       // Creating something to store information into.
      myData=new UserData();
     }
 
 function OnGUI ()
 {
 
 //    playerName = GUI.TextArea (Rect(generalWidth,userHeight,100,25),playerName);
     
     //Health ********************************************************************
 //    GUI.Box (Rect (50,75,150,25), "Health:" + playerHealth);
     //EndOfHealth ***************************************************************
     
     //Mana **********************************************************************
 //    GUI.Box (Rect (50,100,150,25), "Mana:" + playerMana);
     //EndOfMana *****************************************************************
     
     //Energy ********************************************************************
 //    GUI.Box (Rect (50,125,150,25), "Energy:" + playerEnergy);
     //EndOfEnergy ***************************************************************
     
     //Currency ******************************************************************
 //    GUI.Box (Rect (50,150,150,25), "Gold:" + playerCurrency);
     //EndOfCurrency *************************************************************
     
     //Experience ****************************************************************
     GUI.Box (Rect (10,10,60,20),"Level:" + curLevel);
     //EndOfExperience ***********************************************************
     
 
     //LoadingPlayers ************************************************************      
     if (GUI.Button(_Load,"Load")) {
       
       GUI.Label(_LoadMSG,"Loading from: "+_FileLocation);
       // Load our UserData into myData
       LoadXML();
       if(_data.ToString() != "")
       {
          myData = DeserializeObject(_data);
          VPosition=new Vector3(myData._iUser.x,myData._iUser.y,myData._iUser.z);             
          player.transform.position=VPosition;
          curExperience = myData._iUser.experience;
          Debug.Log("Load Successful");
       }
             
    }
    //EndOfLoadingPlayers *******************************************************
    
    //SavingPlayers *************************************************************
    if (GUI.Button(_Save,"Save")) {
             
       GUI.Label(_SaveMSG,"Saving to: "+_FileLocation);
       //Debug.Log("SaveLoadXML: sanity check:"+ player.transform.position.x);
       
       myData._iUser.x = player.transform.position.x;
       myData._iUser.y = player.transform.position.y;
       myData._iUser.z = player.transform.position.z;
       myData._iUser.name = playerName;
       myData._iUser.experience = curExperience;   
         
       // Time to creat our XML!
       _data = SerializeObject(myData);
       // This is the final resulting XML from the serialization process
       CreateXML();
       Debug.Log(_data);
    }
    //EndOfSavingPlayers *********************************************************
 }
 
 function Update ()
 {
 //    if(playerHealth <= 0) {
 //        print(playerName + " has died...");
 //       die();
 //    }
 //    if(playerHealth > MaxPlayerHealth)
 //    {
 //      playerHealth = MaxPlayerHealth;
 //    }
     // Here is the level decider. If the current exp is higher then the number there then you +1 level.
     switch(curLevel){
         case 0:
     if(curExperience <= Lv0){
          curLevel += 0;
          }
         case 1:
         if(curExperience >= Lv1){
         curLevel += 1;
         LvMax = Lv1;
          }
        break;
         case 2:
        if(curExperience >= Lv2){
          curLevel += 1;
          LvMax = Lv2;
 
          }
        break;
        case 3:
        if(curExperience >= Lv3){
          curLevel += 1;
                  LvMax = Lv3;
 
          }    
       break;
        case 4:
         if(curExperience >= Lv4){
          curLevel += 1;
                           LvMax = Lv4;
 
          }
       break;
        case 5:
        if(curExperience >= Lv5){
          curLevel += 1;
                           LvMax = Lv5;
 
          }
        break;
        case 6:
        if(curExperience >= Lv6){
          curLevel += 1;
                           LvMax = Lv6;
 
          }
        break;
        case 7:
         if(curExperience >= Lv7){
         curLevel += 1;
                          LvMax = Lv7;
 
          }
        break;
        case 8:
         if(curExperience >= Lv8){
          curLevel += 1;
                           LvMax = Lv8;
 
         }
       break;
        case 9:
         if(curExperience >= Lv9){
          curLevel += 1;
                           LvMax = Lv9;
 
          }
        break;
        case 10:
         if(curExperience >= Lv10){
          curLevel += 1;
                           LvMax = Lv10;
 
          }
        break;
     }
     
 }
 
 
 
 
 //function die()
 //{
 //    player.transform.position = Vector3(5,0,5); // A vector 3 teleport
 //    playerHealth = 1000;
 //    playerMana = 1000;        // Reseting the vitals or else it will loop the death(HP = 0)
 //    playerEnergy = 100;
 //}
 
 //function OnCollisionEnter( collision : Collision ) {
     
 //   if(target == null && GameObject.FindGameObjectsWithTag("Enemy")){
 //    target = GameObject.FindWithTag("Enemy").transform;
         
 //}
 //}
 
 //function OnTriggerEnter()
 //{
 //     if(target.gameObject.tag == "Enemy")
 //     {
 //         collider.isTrigger = true;
 //         playerHealth -= damageNpc; // Comment this out if you dont wanna take damage.
 //         curExperience += 5; //Exp per interaction with the enemy.
          
 //     }
 //}
 
 //XML Code *****************************************************************
 
 function UTF8ByteArrayToString(characters : byte[] )
 {     
    var encoding : UTF8Encoding  = new UTF8Encoding();
    var constructedString : String  = encoding.GetString(characters);
    return (constructedString);
 }
 
 
 function StringToUTF8ByteArray(pXmlString : String)
 {
    var encoding : UTF8Encoding  = new UTF8Encoding();
    var byteArray : byte[]  = encoding.GetBytes(pXmlString);
    return byteArray;
 }
    
 
 function SerializeObject(pObject : Object)
 {
    var XmlizedString : String  = null;
    var memoryStream : MemoryStream  = new MemoryStream();
    var xs : XmlSerializer = new XmlSerializer(typeof(UserData));
    var xmlTextWriter : XmlTextWriter  = new XmlTextWriter(memoryStream, Encoding.UTF8);
    xs.Serialize(xmlTextWriter, pObject);
    memoryStream = xmlTextWriter.BaseStream; // (MemoryStream)
    XmlizedString = UTF8ByteArrayToString(memoryStream.ToArray());
    return XmlizedString;
 }
 
 
 function DeserializeObject(pXmlizedString : String)   
 {
    var xs : XmlSerializer  = new XmlSerializer(typeof(UserData));
    var memoryStream : MemoryStream  = new MemoryStream(StringToUTF8ByteArray(pXmlizedString));
    var xmlTextWriter : XmlTextWriter  = new XmlTextWriter(memoryStream, Encoding.UTF8);
    return xs.Deserialize(memoryStream);
 }
 
 
 function CreateXML()
 {
    var writer : StreamWriter;
 
    var t : FileInfo = new FileInfo(_FileLocation+"/"+ _FileName);
    if(!t.Exists)
    {
       writer = t.CreateText();
    }
    else
    {
       t.Delete();
       writer = t.CreateText();
    }
    writer.Write(_data);
    writer.Close();
    Debug.Log("File written");
 }
    
 function LoadXML()
 {
    //StreamReader r = File.OpenText(_FileLocation+"\\"+ _FileName);
    var r : StreamReader = File.OpenText(_FileLocation+"/"+ _FileName);
    var _info : String = r.ReadToEnd();
    r.Close();
    _data=_info;
    Debug.Log("File Read");
 }
 
 //EndOfXML Code **************************************************************