sql 2008 link

SQL Server Express Edition 2008:

http://www.microsoft.com/downloads/en/details.aspx?FamilyID=b5d1b8c3-fda5-4508-b0d0-1311d670e336&displaylang=en

SQL Server 2008 Service Pack 1:

http://www.microsoft.com/downloads/en/details.aspx?FamilyID=66ab3dbb-bf3e-4f46-9559-ccc6a4f9dc19&displaylang=en