I read his request differently, your reply gives him numbered pages, mine gives him a list of consecutive numbers down a section of the page. I'm assuming there is a list somewhere on the page that he wants to number the lines - but his request is unclear.
Didn't mean to stomp over your parade - I didn't even read your response fully the first time I posted because he didn't ask how to do page numbers... I'd just tell him to us MS Word Edit header, Page [&page] of [&pages] then hit file, print pages 1-20 or however many page numbers he wants.
Sorry to come off offensive, I didn't want to create conflit, just offer a simple answer depending on what he was really asking for.
AidanEnos