From your 11/22 post, I surmise that you want page numbering like 1a, 1b,...,
2a, 2b, 2c,..., 3a, 3b, 3c, 3d, etc. If this is the case, then you are not
adding a suffix, you are adding a prefix. The page number is the part that
changes automatically(a, b, c, d, etc.). By breaking your publisher document
into sections you can force the page numbers to start over (a, b, c,...).
You would still need a separate master page for each section, in order to
have a different prefix.