Well, I'm LDS, and I believe that all of the hymns in the current ("green") hymnal and the older ("blue") hymnal have tune attributions, although they are somewhat less than helpful. "Scotland the Brave" ("Praise to the Man") is "Scottish Folksong," for example.

It is funny when a song you've sung as a hymn for many years ("If You Could Hie to Kolob"), and suddenly out of the blue you hear the folksong from which the tune was cribbed ("The Unquiet Grave"). I was . . . startled.

Weasel Books: don't get defensive. I know that some LDS hymns are slightly different from the "standard" versions, and there's nothing wrong with altering a hymn to accord with your own view of doctrine. (Although I believe that they didn't make any alterations to "A Mighty Fortress is Our God" . . . but they could only find about two verses that didn't contradict LDS teachings to include in the Hymnal!)

My current obsession is to find a recording of "All is Well," the tune (shape-note sounding to my ear) which was modified to become "Come, Come, Ye Saints." Anybody know of any?

Incidently, the Church's website has a fantastic set of pages for the Hymns, with midi playback of each part (SATB); it also has the attributions, I believe:

LDS Church Music