Jeane, May god bless you and has already blessed Jon and continues to do so. May he also bless your Agent that suggested that you take the cruise. I could not imagine your sorrow :( . Your post though does bring to light 1 thing. With all the negative post's I have read about Carnival cruises, it is refreshing to read that they were able and accomidating with your request. Let me explain....
We sailed on the Celebration in 1990 for our honeymoon. 2 years ago (2006) I surprised my wife by booking a cruise on the Triumph that did the same exact itenerary we had done for our honeymoon and it left on our 16 year anniversary. I had purchased a "Renewal Of Vows" package onboard and invited 2 friends we had met on the Grand Princess 2 years prior...They agreed to come and "Stand-Up" for us. The ceremony was great, The Captain performed the ceremony and they provided us with a cake, hour'derves and pictures from throughout the ship.
I won't go into more detail but I'm sure you get the message. I have been on 7 cruises (5 of which were with Carnival) and am working on #8 for this year. Carnival is my 1st choice when looking into cruises. May God and Jon continue to watch over you.