I am getting married at a historic building across the street from a Catholic church.  Before the ceremony I want to do a prayer for my godfather who has lung cancer.  The wedding is kind of a destination wedding from the stand point that I don't live there anymore so I am no longer close to anyone in the religous community.  I think it is important that this prayer be lead by someone who is ordained, and my officiant won't work as he is a retired judge.  I am thinking of talking to someone at the Catholic church to see if someone would be willing to come over and lead our family in the prayer before the ceremony.  Because I am not familiar with Catholic traditions and rituals I wanted to first ask here and make sure that I am not asking anything that could possibly offend anyone at the church.  Any insight would be greatly appreciated.  Thanks.