Susan Marie, there is one which Libana sings (they are an acapella women's group in Boston) called Mowtay. IT is easy to learn and the words translate to "The spirit and I are one, foever and ever." It was written by a Native American.
I have several others on tapes and cd's of Native Americans. I could send you voice email with the tune or, if i can find time, a simple midi of the tune with an email or personal message with the words, if you'd like. Send me a personal mesage with your email addy if you want me to do that, okay.
Later tonight, I will post some more references. There is a group here on the Wind River Rez who has beautiful songs but no tapes, so I haven't had a chance to learn them
I also have links to several NAtive sites with midis of some wonederful songs, I will post later.