If you have Word 2003 or earlier, View | Header and Footer, switch to the
footer, and insert the "Filename and path" AutoText entry from the AutoText
menu on the Header and Footer toolbar.
Caroline34,
I'm guessing you use Word 2003?
Go to View - header and footers - on the toolbar click the first button
which let you insert AutoText, choose filename and path. Close the header
and footer.