After reading the d20 Hârn Guide created by Shane Morales (the Version 1.01 copy dated June 9th 2002) I have decided to do my own D&D5e Hârn conversion. As part of the project I will be building supporting Fantasy Grounds Library Modules in the hopes that one day it will be complete enough to run an actual online Fantasy Grounds campaign.
Right now I envision I will need at least 3 modules, one named Hârn Bestiary, Hârn Player and Hârn Religion. Hârn (or more accurately HârnWorld) will basically take the form of the game world for the D&D5e campaign with the D&D5e classes, backgrounds, etc being reworked to fit Hârn. This will also require converting the Hârn specific monsters to D&D5e data.