So the old data is all on 1 line like?
(1 Ex) John Doe 1 Main Street New York New York 10029
(2 Ex) John Doe, 1 Main Street, New York, New York, 10029
If your lines are the (2 EX) then it is easy, if it is (1 Ex) then it is going to be difficult. I can think of a little trick in Visual...