I have written a complete guide to the Traditional Irish Wedding.
You can find everything you need to put together the wedding from scratch. Even a strawboy costume illustration.
One very important section is that concerning music.
I have all of the tunes listed as well as songs with notation!
So....
Go for it! Inexpensive! Lots of folklore of weddings even stories.
And it keeps my work going....
Or at least pushes the debt back a bit :}

Here is the link:
http://www.geocities.com/artcars/iwed2.html

The Best Guide to the Traditional Irish Wedding!

You can purchase it via paypal and I will have it in the mail immediately....
http://www.geocities.com/artcars/paypalprice.html
Get the book via paypal fast!

Good luck finding a song!
If all you had was a polish polka band given my book they would be soon playing as celtic as any!

Conrad