The Limerick Rake is indeed in the DT -

here.
http://www.mudcat.org/@displaysong.cfm?SongID=3602&Title=LIMERICK%20RAKE

Related thread: http://www.mudcat.org/thread.cfm?threadid=17493.
(It's a different song with the same tune.)

The Dubliners did a great version of this song, with Ciaron Bourke singing the song unaccompanied. It is quite a spirited rendition, and includes the line about "twisting their garters" mentioned by Liam's Brother.

Also the song can be found in Folksongs & Ballads Popular in Ireland, vol. 2, ed. John Loesberg, Ossian Publications, 1980. This seems to be the source of the version at the French site mentioned by Philippa above, despite the wrong year and wrong page numbers given in its "Référence". It is in fact on pages 54-55. The text found on the French site (its pop-up ads are driving me nuts, by the way) is quite identical, apart from the occasional typing error. The notes of the book has the following to say:

THE LIMERICK RAKE: The tune is An Caitin Bán. The words are from a printed balladsheet of the last century. Another version is called The Galbally farmer.

John Loesberg's last comment ties in nicely with the Related thread I mention above.

The Prof's pages mentioned in Philippa's post is again quite identical to Loesberg's version (again with occasional typing errors - but at least they are different typing errors :-). The "Prof" has even copied John Loesberg's suggested guitar chords.

I too would like to learn more about the history of this song.