Description as posted at the Vault by Seranne:

Description

This is a little GUI box that adds an XP bar to the player’s screen. This is completely in HAK form - there’s no need to import scripts or anything else. Just read the readme, try the demo and use the hak. I included the script source in the hak so feel free to play with it. It’s draggable so you can move it to whereever you like it.