We are working on a Reggae version of Jerusalem for our naff for a laugh website. So far, I have played it on the Martin and put in some sound effects. Should be a scream when we are finished with it. I got the idea from a guy who did a Reggae version of the German national anthem about 15 years ago. Cant remember who this guy was ,,, but he was funny. Should anyone want to have a try at playing it on their guitar, then its easy. Start off a finger picking pattern in A major and you will find the notes aren't too far away for playing the Hubert Parry classic. Just watch the timing and dont play too fast.