Recording the acoustic guitar...

As with any acoustic instrument, the guitar's frequency response could be a tricky issue when getting it recorded.  When in doubt, a decent omnidirectional microphone (a mic that responds to frequencies coming from 360 degrees/all angles) may be just the answer!  The instrument needs room to reverberate.  Therefore, leave some room for the sound to settle between the mic and the guitar.  Remember you are telling a story through sound.  I have found that using this technique will avoid directional issues.