I was browsing over at TGP and I ran across this thread on the Nashville tuning. That is replacing the four bottom strings with a lighter gauge and tuning them an octave higher. You leave the top B and E as is. Well curiousity made me go down to my favorite store and pick up some lighter gauge strings as advised. I took one of my acoustics and restrung it this way. Wow what an interesting sound, it seems to work better in some keys than others, especially nice in E. Sort of a cross between an open tuning and 12 string sound. Try it you may like it..... I do.