void main()
{
    object oNPC = OBJECT_SELF;
    object oItem = GetFirstItemInInventory(oNPC);

    while (GetIsObjectValid(oItem))
    oItem = GetNextItemInInventory(oNPC);

     {
      if (GetDroppableFlag(oItem) == FALSE)
     {
      SetLocalInt (oItem, "notdroppable", 1);
     }
      if (GetLocalInt(oItem, "notdroppable") == 1)
     {
      //20% chance to drop item inventory not already set as droppable
      //object oDrop = GetLocalObject(oItem, "notdroppable");
      int bDroppable = d100()>50;
      SetDroppableFlag(oItem, bDroppable);

     }
    }
}