I only have 2000, so I'm not sure about the following. Check at school to see if there isn't an option to save the file in an earlier version. In the SAVE AS dialog, click on the drop down list at the bottom next to SAVE AS TYPE.
Publisher 2000 has the option to save files as file type Pub 98. Now I don't know whether 98 has the option to save as 97. Though all this is academic if you don't have access to a computer with 98 on it. Just a thought.