Thanks to all for the ideas which made me think harder and develop a solution. Hearing other ideas is a stimulant.
I finally used GREP. This allowed a logical sectioning of the file (which I just discovered) within the stanza tags. Once this was done, and the lines I was interested in were isolated from the rest of the code, a regex find and replace on the lines in the sections worked like a champ. Trying manually to do 75 stanzas X 5 to 10 lines per stanza would mind numbing.
I need to dig deeper into this GREP.
BTW, the file looks great>