All the other messages seem to have some wonderful and very appropriate songs for weddings. Here is my favorite, It's called November wedding by Vin Garbutt and can be found on his CD (Called The By-pass Syndrome) He accompanies this lovely song with the tune The South Wind. Here are the words in case you can't find them anywhere.

November Wedding.

Dancing and singing and bringing in flowers in springtime,
In Autumn for you love thoughts of the true love that I hold for you love,
For I have no other it bothers me not that my lot is with you for a lifetime and long,
O my love it grows stronger it knows no bounds,

Sounds on the south wind and whistling and wedding rings glistening on fingers,
And singers of songs raising voices rejoicing the choice of each other,
As partners in marriage the carriage that carries us in to future,
With presents material feelings etherial,
Casting the fear of all trouble and strife that this life has to offer.
And I have no other it bothers me not that my lot is with you for a lifetime and long
O my love it grows stronger it knows no bounds.

Sorry this is only a rough outline from my head but the complete words should be available somewhere on the net. Let me know if this is any good.
From Mulley.