This question gets asked a lot. Usually, with some variation, but bottom line "How can I get (insert name) sound?
The usual answers are:
1. Get (insert name) to play it. That tone is all in his hands.
2. You can't get it without using the guitar he played, the mics he recorded in, the room he played in, and the high end equipment that was used to record it.
3. Someone will chime in and say that if you use (insert name) pre amp, and (insert name) mic, and record in a properly treated room, then you can get close to that.
The real bottom line is that you have to experiment with
your mics,
your pre amps,
your guitars, and make sure that you are in a room that has been properly treated. There is no magic way to get the sound of a professional musician in a professional studio. But you can get close, and that's the best you can hope for. Study the insert that came with that box set. There are lots of close up shots of him doing the recording session, and he even explains some of how it was done. You can approximate where the mics were in relation to his guitar. If you look close, you can even see which mics he was using. I have it, but not with me, or I'd break it out and tell you.
The other thing to remember that they were probably going into very expensive pre amps, and most consumer grade pre amps pale in comparison. But with some careful tweaking, you can match it.
The last piece of the puzzle is how it was mixed. A good graphic eq will be your best friend. Along with a good compressor and reverb.
Experiment. We all had to at one time. There are websites that will tell you how to mic an
acoustic guitar if you google it. And learning how to use your effects, be it plugins or outboard gear, will go a long way toward achieving the sound you are after.
One thing to remember: it's damn hard to get a $60 no-name acoustic to sound like a Martin D45...