프로그램을 이용하여 masterpage 설정하기.

Programmatically Inherit Master Page
http://sharepointserver-2007.blogspot.com/2008/09/programmatically-inherit-master-page.html

Deploying a custom master page in SharePoint 2010
http://www.sharepointchick.com/archive/2010/03/26/deploying-a-custom-master-page-in-sharepoint-2010.aspx