There are probably a few others out there with working knowledge of THN's, but you will be extremely lucky to get hold of them (most are either to engrossed in other projects or are not active these days). Most Freelancer coders are still at the ini stage, very few go onto deal with THN's. The best advice I can give is do what I did, go through and read what tutorials and threads are available on THN's here on this forum (using the Search feature) and then pick apart what THN's that exist in Freelancer comparing that information. Also, give yourself a crash course in Vector Mathematics, if you don't know it already, as it will be needed for orientating in the THN's.
Freeworlds Mod Developer
Author of Modular Station
'There is no Good nor Evil in the universe, just perceptions and circumstances.'