AFAIK, there's no way to do this.

On Mon, 7 Mar 2005 17:11:03 -0800, "Steve at Guardsmark" <Steve at
wrote:

A user at my company took over a computer previously used by someone else.
Excel contains a custom header containing the previous users name. She
accidentally sent a report with that header attached and is in a bit of
trouble with the boss. I'm trying to find the simplest way to remove the
custom header to avoid a repetition.