Customizing the Refinement Panel web part in SharePoint 2010
We created our own results page: Results.aspx
We can modify the “Refinement Panel Web Part” only if we can edit the create a new .aspx results page and change the “Search Setting” to point to the new Results.aspx page instead of the default: 00SSearchResults.aspx
Now that you can edit the “Refinement Panel Web Part”. You might also want to customize which refiner’s appear in the web part. This video will show you how to edit the XML.
Other helpful links: