Believe it or not, not everyone can. And most won't try.
Remember, I started work on this mod over two months after 1.61 came out. I originally figured someone else would just update Alerum's mod. It never happened.
So just keep working at it. The beauty of making your own mod is that it that what
you want gets put in first!
And don't forget to publish what you've got every so often. People post "alphas" and "betas" all the time here.
NJAGCM was actually one of the tougher ones to get working. The last published one is too buggy. Try using what I have in mine. Note that you can't ignore the part that loads from the ini file until you have the rest working because it loads the era names and colors from there. You 'll note I'm still using the original parser though, just redirected the ini file.
I don't see it included in any mod not made by TheLopez except mine. Most of the mods here use simpler clock mods like Homegrown's or Snaitf's or HOF's. Like many of TheLopez's mods, it was "too good" -- meaning too complicated for others to easily merge in theirs. Good Luck.