There's the Nashville method of tuning, which involves replacing the three low freq strings with thinner strings that are one octave higher than the originals. I think you also need to open tune. If I remember correctly, "Wild Horses" by Rolling Stones uses a guitar in Nashville tuning.
... and that's all I have to say about that.
[U]ALL[/U] generalizations are [U]WRONG[/U]
[/sarcasm]