Change Default Search Scope of your Search Results Page
This, surprisingly, took a lot of digging to come up with, but the solution is simple. 1. Go to your search results page 2. Click Site Actions > Edit Page 3. On the search Core Results web part choose 'Modify Shared Web Part' 4. Expand the Miscellaneous section. 5. Type your scope name in the 'Scope' box, then click apply. 6. Test your Search