New D100 based Ruleset extension for D00lite - Where to start?

[EXTROMEDIA]

I just figured this out using MoreCore with a Dice String: /rollunder 1d100x(p1)
Where (p1) is the input field or a value such as 65 for your Ability Score value.
Set this up on the character sheet or use it in the chat window.

Hope this helps someone.