As far as I know, they did some digging in the code, but they couldn't find the right path... :(
I involved two gurus in "digging" for this task, but contact with them was lost because they went to work for a game development company and eventually blocked their ICQ accounts, or maybe they switched to another messenger, but in any case, there's no activity on ICQ! :(
The question now is about what you patch when you add support for NCF. I saw your message somewhere that you don't do it through a patch. So, does that mean you're inserting something into the hex? That's what's interesting. How does this file differ from the original 5.5?
I understand about NTF.