Topic: customized setting defaults for all users

We have HDSP AIO installed in a Win XP.   Our workstations have multiple user logins.   We would like to use a system wide default1.mix file so that any user who starts HDSP Mixer, and who doesn't already have a saved user specific settings file, will get our customized setting defaults for all users.  (We are mainly interested in saving Matrix settings).

How can I do this?   Thanks.