Hello People, I was recommended to this site by a friend (excelent I must say) to help me answer a query i have

I reside in the Republic Of Ireland, and a few years ago i heard a parody of a very well known song, about Dublin and it's surrounding area's and townlands, needless to say the original is all laneways, friendly people and old time ireland, the parody, motorways, drug dealers, prostitutes, so on, as parody's do tend to be.

Now I know, the area in wich the parody originated, is fairly well aquainted with the song, especially among the older generation strangely enough, but here lies my problem.

I (ahem BORROWED) the parody, and altered it accordingly to suit my hometown, way across country from Dublin, wich i sing in pubs, and gatherings to everyone's delight. HOWEVER.....
Through singing the song, it fell to the ears of a singer, unknown to me who robbed it, of wich i can't complain, because thats what i did in the first place, BUT...... He has now recorded it onto CD for sale at his gigs, and claiming it his own.

I along with the original parody-ers no doubt think, this is fairly shitty of him, and am wondering if there is any noose on wich to hang our musical prostitute, would appreciate any thoughts or comments on this

NOTE: Rep Of Ireland may have different ins and outs to GB and states, wich you no doubt know, just noting it

Thank you
PJ