Kiwi,

my copy of the Clannad in Concert LP has a sheet with all the lyrics, so in principle it would be easy, but there are two problems...
A minor problem is that I do not speak Gaelic and would have to type it down letter by letter
The big problem is that the text sheet does not use the alphabeth I know but the Gaelic alphabeth. I do not know how to do the transcription (I even would have typed the title wrong).
I could send you a photocopy of the lyrics via snail mail (or to anybody who cares to do the trancription into a better known alphabeth). Drop me a mail with your snail mail address if you agree with that idea (hell@psy.uni-muenster.de).
I am not able to solve the other problem (translation) for you.

Wolfgang