Several ways:

1.    With a formletter type mail merge main document, insert a one row four
column table in the page and set up the information for the note in each
cell of the table and insert a <<Next Record>> field before the first merge
field in the second, third and fourth cell of the table.   Use Alt+U to
remove the borders from the table if desired.

2.    With a catolog (or in XP and later it is called directory) type
mailmerge main document, set up the note at the top of the page and execute
the merge to a new document.   You should format each paragraph in the note
other than the last one so that they are "Kept with next" and all of them so
that they are "Kept together" and of course, the note should fill a quarter
of the page.

3.    Use a formletter type mailmerge main document with one instance of the
note on it, execute the merge to a new document and then print that document
as four pages to the sheet using the setting on the File>Print dialog.