The efforts of Father Paul O'Brien in Saint Patrick Parish, Lawrence, Mass., to balance the needs of longtime Irish-American parishioners with those of newcomers to the parish, immigrants from the Dominican Republic, Puerto Rico, Vietnam and Cambodia. That includes building a meal center for Lawrence's hungry, a cause for which he recruits his old Harvard classmate Conan O'Brien, and introducing services in Spanish. Longtime church members, however, aren't sure if the changes are for the good.