I got married July 8th. I think they have a generic ceremony that they use. I also did a symbolic ceremony. I made up my own ceremony (from online) and sent it a few weeks before. I asked to do the unity sand thing. They will give you the container and you can pick the colour of the sand. It was $40. You get to keep it after the ceremony. I have my ceremony saved. If you would like I can send it to you. Also let me know if you have any more questions.
I brought a CD with the songs I selected. I had a few songs for before the ceremony, songs for wedding party and a song for myself. I was worried about them messing up but they did it perfectly. I just labelled the CD with instructions -- ie track 7 Bride entrance. I used the guitarist for the cocktail hour. Hope this helps.