Well this tune came up in an even older thread - so old that it was on the "Coolboard" predecessor to this forum - because I remember suggesting a number of options to attack the thing on whistle. The png that I posted is still lying around on my web site so here it is just in case anyone is tempted to try it jacking up the entire first phrase.
The interesting feature about this tune, which you need a stupid and nonsensical G-string to play and probably to understand, is that the same motif is repeated in three octaves consecutively (i.e. the note sequence GABD - although the D is sensibly dropped for the 3rd repetition). I haven't come across any other tune in which anything similar occurs.
Steve
PS BTW Kevin Burke quotes Martin Byrnes as the source of his version.