Dougie as many other guitarists do plays a mix of chords, notes, suspensions and drones (think of the pipes). Naming the chord might help to remember, however with this style you might find that if you were to replace the chords with the same named chords in standard tuning, that the results wouldn't work very well. That's a tortured sentence but I hope it makes sense.

It's a great song, good luck with it

Stu