Actually I've already deleted the QBW that run open_wifi_hotspot.sh as I'm using Bluetooth-PAN tethering now, for better security (small proximity) and much lower power consumption. (you may refer to my sig for details).

However, setting up QBW for this script is very simple:

1) Add new Widget
2) Choose Queen BeeCon Widget
3) Edit the Widget you've created on your desktop
4) Add Cmd
5) Enter Title: WiFi HotSpot
6) Enter Command: echo <path_to_script>/<name of the script> | root
e.g. if the path to the script is /home/user/script/ and the name of the script is open_wifi_hotspot.sh, then the line would be:
echo /home/user/script/open_wifi_hotspot.sh | root
(you need rootsh installed, but I'm sure you do)
7) Save
8) If you don't need to change the outlook of your QBW icon, you can just accept all the default and save.
9) Done

Hope this helps.