You will surely get some answers here but in my opinion, it's very hard to explain to someone but very easy to show someone. If you can find a video showing how it's done it will make it much easier. After you see it done once you won't forget. I've tried to explain it to a few people and after I get to the part of making the loop and twisting the strings back together, I can see the blank look on their face. Check on here, there might be a video clip of it.
Aaron