[Skunkworks] Unix script

Hi guys, I need to replace a form feed character with a line feed character in a text file on unix (HP UX to be precise). Was hoping to use sed using this <http://www.cyberciti.biz/faq/unix-linux-sed-ascii-control-codes-nonprintable/> as a guide but I don't know how to pass the \n character to replace the /f character.