Please for give my lack of understanding - one thing I have learned is that folks have different gear, goals, and workflow to attain those goals. I am assuming my own ignorance here.
It seems odd that you would record an acoustic guitar track (in free time?) and then add a drum track to that. ?
Have you gotten into the software that comes with BeatBuddy? The reason I ask is because I was just watching a video and it appears that you have the option of creating/editing your drum parts on the computer and then importing those drum parts as .wav files to the Tascam. I do this with EZDrummer 2 (I thought
it was the latest and greatest drum machine

). If there is a part at the beginning of a song where the acoustic guitar is by itself - you can simply play to a click over that part and then silence that section later with the Tascam editing features.
Anyway.... I'm just talking here... I absolutely assume that I may have misunderstood what your goal is. Sorry about that.
You asked in the other thread how I went about using a tone or pulse to line tracks up. I'll explain that in case it's helpful - but first let me explain what I was trying to do:
I was needing to take individual old track data from an older Roland recorder (VS840) and move those performance tracks to the Tascam DP (so that I could clean them up and work with them again). Converting those special Roland VS files to .wav and then simply importing them to the DP was not an option. So I hooked up my drum machine (in this case it was a Roland R70) to the VS840 and at the point before the song started I recorded a brief, short.... but sharp "drum hit" (I can't remember - probably a rimshot or something). I recorded this hit to all 8 tracks so that it was at exactly the same spot on all 8. I then *played* each individual track to it's own respective track on the DP and recorded those - one by one. I then went in and using the track editing tools and Jog Play function... I lined up each of the "rimshot" hits so that they were at exactly the same "clock/counter" point on the DP.
It worked perfectly.
But you can see that I went to some trouble to get this done. But it was important to me... that old song... so well worth the trouble, for me, in the big picture.