Well, adding this information in the main HUD is no problem; in fact, a little script I wrote just suits the needs. The problem is adding (duplicate) an inventory box (for example) in this position: http://img820.imageshack.us/img820/7787/pipboyi.jpg and modify the inventory_menu.xml and items_stat_display_inventory.xml consequently to show the variable that stores the calculated value in the script. So, two questions come into my mind: 1) Is it possible to add another box element the inventory menu? and 2) Suppose I have my newly created box in the menu, will it update its value even while hovering the mouse on the inventory item (like shown in the above image)?