I would like to find this too. The only thing I've come up with the Outsidaz, When I Die I'm A Try to Take the Whole World With Me. I like the version in the commercial - it sounds very hymnlike, but dreary.
The song was written by Julia Brown, who lived in the town of Frenier in Louisiana in about 1915. It was reported she used to rock back and forth on her porch singing the lyrics, "When I Die I'm going to Take the Whole Town of Frenier With Me". On the day of her death, The Great West Indies storm of 1915 hit in all its fury, destroying the town.
Source(s): http://www.plantationadventure.com/des_ghostswamp.htm