http://blogs.msdn.com/b/vsnetsetup/archive/2009/10/02/how-to-install-expression-blend-and-sp1-in-silent-mode.aspxFor the detailed steps on how to install Expression blend and SP1 in silent more, please refer to the link below http://blogs.msdn.com/smondal/archive/2009/08/31/how-to-install-express-blend-and-sp1-in-silent-mode.aspx Content by: Soumitra Mondalen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)