I'm afraid a lot of those questions have "No"as the answer, so let's try narrow it down:

You can load it into the separate Audio Chord Wizard application to try establish what chords were used in that particular file. Those chords can then be entered into BBox, regardless of what style you choose, in where you can work on it further like it was any standard BBox song. Chances are high that you will want to use either of the styles that contain the instrument you liked so much, but you can change any of the other instruments as you see fit.
What you can however not do with BBox is isolate any given sound from a group of sounds in an audio file. For that you will need a much more DAW-oriented application than BBox ever presumes to be. And even with many DAWs you'll be hard pressed to find a way to do this, Melodyne might be just the only application that I'm aware of that might crack such a digitally specific task.
But all is not lost, you could still put your own transcribing skills to the test, now that you have the audio file locally to listen to as many times as you like, and try make out the guitar notes by ear yourself. That is the closest you will get to the actual playing in that particular file, for even if you find the exact chords and use the exact same style, BBox is designed to not repeat the actual playback of anything twice unless a track has been 'frozen'.

I hope this clarifies a few things for you a bit better.

p.s. You probably had the file all along and just didn't know about it. Now that we got the correct filename, try do a search in your Realtracks Demos for "2650band.m4a". It should be there wink

Last edited by Icelander; 03/06/18 04:33 AM. Reason: further details
Just because you can, doesn't mean you should!
----------------------------------------------------------------------
BBox 2022 Audiophile, Mac Pro Intel, OSX 10.6.8, 800x600 (TV VGA)