How to change tracking method in Project 2003

Hi all,
I understand that i am able to change the tracking mode for project 2003 whenever i publish a project. But how can i change that in project 2003? I know can set default and force PM to use the default tracking mode if we set in PWA. but currently the setting for PWA is Allow project managers to change the default method for reporting progress if a different method is appropriate for a specific project. So how do i change the reportin/tacking mode for project?

Thanks !