how to make a Equipment Script

how would i go along making a equipment script so if you press on a object with a tag helmet than add to the helmet slot and add to our player? i have made a little something and stated with enum but i just got lost here it is:

 enum ArmourPiece { Helmet, Platebody, Platelegs, Cape, WeaponSlot, ShieldSlot }
 var Equipment = ArmourPiece.Helmet;
 
 function AddToEquipment() {
 gameObject.tag = "Helmet";
 
 gameObject.tag = "Platebody";
 
 gameObject.tag = "Platelegs";
 
 gameObject.tag = "Cape";
 
 gameObject.tag = "WeaponSlot";
 
 gameObject.tag = "ShieldSlot";
 
 }

i have a inventory script but it has a bunch of errors but here it is :

 var EmptySlot : Texture2D;
 class InventoryItem
 {
 var ItemTexture : Texture;
 }
 function Start () {
 Empty();
 GUI.Box(Rect(20,20,50,125), "Inventory" );
 }
 function Empty()
 {
 GUI.Button(Rect (10, 10, 10, 10), "Empty");
 GUI.DrawTexture(Rect, EmptySlot);
 }
 function Loot(){
 GUI.Button(Rect(20,20,50,125), ItemTexture);
 GUI.DrawTexture(Rect, ItemTexture);
 } 

and here it the inventoryitem script:

 static var ItemTexture : Texture2D;
 function OnMouseDown(){
 Loot();
 }
 function Loot(){
 GUI.DrawTexture(Rect(10,10,60,60), ItemTexture, ScaleMode.ScaleToFit, true);
 }

thank you to anyone who helps :)