Changing 2003 Default View of ALL Mail Folders

[Brian]

I don't prefer the default "Show in Groups" view for my
mail folders. Since upgrading to 2003, all existing and
new folders appear this way and I have to manually go
to "View - Arrange By - Show in Groups" menu and deselect
this. How do I make the default display something else
and have it apply to all existing and new folders at once?

Thanks!