It's originating script comes from
NoSkill's Powerscroll Picker
This has some major changes to it, with those major changes, more items, and some 'extras' that are from my original changes which you will see from my post on that thread.
This one though, I included Powerscroll120...
Power Hour API
Exposes an advanced API that provides a complete Power Hour solution.
With this module, you can easily integrate Power Hour checks into your code with one simple line! The rest of the hard work is done by the module.
Can be easily integrated into Skill and Stat gain checks, Loot...