SYOSSET - Loved ones said a final farewell today to a Nassau nun fatally struck in a Hamptons hit-and-run last week.Thousands attended Sister Jackie Walsh's funeral, with mourners spilling out into the church's parking lot. Walsh entered St. Edwards the Confessor Church ? her parish for more than a decade ? for one last time, escorted by her fellow Sisters of Mercy.Church members say they wished they would have had more time with Walsh, who was killed by a hit-and-run driver Monday in Southampton while on a retreat. She was 59.Police found the owner of the SUV that hit Walsh, but they say that's not who was driving. U.S. Marshals are now working to track the suspect down.Funeral Mass to be held for nun killed in hit-and-run