WITH
MOVE 'northwind' TO 'd:\Program Files\Microsoft SQL
Server\Data\nwind_new.mdf'
MOVE 'northwind_log' TO 'd:\Program Files\Microsoft SQL
Server\Data\nwind_new_log.ldf'
http://www.microsoft.com/downloads/details.aspx?FamilyID=9552d43b-04eb-4af9-9e24-6cde4d933600&displaylang=en
http://technet.microsoft.com/es-es/security/cc184924(en-us).aspx