I have created a custom, site-wide, search scope in SharePoint 2010 (and its associated tab for displaying on the search page). What I would like is to make my custom search the default search for the site collection instead of SharePoint's default option. So my requirement is that when a user types search keywords into the default search box, the search will use my search scope instead of the default one.
I figure that this must be a fairly common thing to do but I just can't seem to find how to do it.