Uhm. Well. It's not a good idea to do that with FP.
But, if it were my project, here's what I would do.
Make page with an ASP file extension. Fill it with ASP virtual includes to
html or text files stored in a separate folder. Print out a sheet and label
each area.
Use the FP upload component to set up ability to upload to that folder for
the users. (Probably should password protect it.)
Let the users update the text, and upload the pages via a browser. The
server will assemble the page on the fly.
But, seriously, if you have three users sitting around updating a page
simultaniously, you have an update process problem, not a technical problem.