Need serious help with entering a new game system!

[Madmaxneo]

Ok need help with the coding bits and where to put it all. It would be great if someone could help me understand and get this all figured out.
First things first, the system I am putting into Hero Lab is called HARP Fantasy. From what I understand so far the first thing I need to input is the die mechanic, which is:
It is a 1d100 system with open ended rolls that open end on a roll of 96 or higher and continue to open end until you roll lower than a 96. Then you add the skill bonus to that total roll and subtract any difficulty mods and an opponents defensive bonus (if striking at someone or something), your total indicates failure or varying levels of success. In fact the only die you ever use is a 1d100.
1. What file would I put this under and how would I do it?

There are no dice involved in character creation (it is an option but I don't use it). The entire character creation system is a point based system. One has 550 points to derive their stats (8 total) from. Any stat from 1-90 costs exactly that point value (A 75 would cost 75 points). A 91 to 95 costs costs 2 per point above a 90, a 96 to 100 costs 3 per point above a 95, and a 101 to 105 costs 10 per point above a 100.

Those are the basics so far... can anyone help me learn how to code this into Hero Lab?

Bruce