Do you have two mics? Here is a technique that I think works well. I also think it sounds slightly more like the player hears it than some other techniques ymmv. I spent about 5 minutes just now and made some examples for you. Maybe its closer to what you want or far from it but here it is...
Assuming you have two mics (preferably the same and small diaphragm condensers)... Place one at the head stock end of the guitar pointing in at an angle in the general direction of the 8-12th frets with the mic actually residing out towards the headstock pointing in at an angle. Place the second mic over your right shoulder (assuming you are a right handed player) at just above or at head height, pointing straight down at the floor and looking down from that position its about 6 inches in front. IE: Actually pointing at the floor and not directly over your shoulder pointing at the sideboard.
The distances from each mic to the guitar should be about the same. The 3:1 rule comes into play here so there isn't too much worry about phase. As-is this gives a very wide acoustic guitar sound best suited where its the main instrument and say a vocal dead center. It is almost too wide but since there are few phase issues you can modify that to taste in Reaper (see examples).
Here is an old pic. If you drew a straight line from one mic to the other (holding the guitar in playing position while sitting on the couch) that line would mostly be parallel with the front of the guitar. I mention because that isn't really so apparent in this 2d picture and the wide angle lense distorts the proportions somewhat:
These samples have no processing except 2db of compression because I think it is needed to smooth out the dynamics and support the thickness further. Its not responsible for the thickness, it just presents it a little better. So, this isn't meant to be perfect mic placement and perfect tone, I would normally cut the lows a good bit to remove the muddiness but I wanted to leave it as original as possible so you have an understanding of what you have to work with aka lows if you need em:
As-is and wide stereo:
http://tinyurl.com/bjad9dg
Same but width reduced to 50%. A little more natural stereo field IMHO:
http://tinyurl.com/avq3qz9
Back to wide again but panned about 50% to the right. Puts it on the right but the extra width leaves just enough on the left to keep the sense of space:
http://tinyurl.com/a5rb53u
One last thing, the room is everything. If the room is too live or just sounds bad you need to stay at least as close as the picture, the tighter or more pleasing the room sound is you can raise the shoulder mic higher and move the neck mic out further. If the room is horrible you'll end up too close so I'd start with something like the picture with maybe 18" from the guitar.
This was 60 second mic placement and strum (I don't know the song) as a clinical presentation and is in no way expected to be musically interesting.
Hopefully this helps, it may be horrible to you ears and nothing near what you are trying to achieve but I couldn't think of a better way to get the idea across. Hope it helps or gives you some ideas.