At the risk of banishment, and having my tongue imbedded permanently in my cheek , how about O'Sullivan's March for the Processional, and Lilting Banshee for the Recessional?=8^O
Hrmm.. maybe you can head to JC's tune archives and search "Wedding". I'm sure you'll be able to find some tunes with "Wedding" in them. Or seach the forum.. I think there was a thread once asking about this. Off my head I can think of Haste to the Wedding and the Wedding Reel.