Visual Studio 2008 SP1.
.NET Framework 3.5 Service Pack 1.
Silverlight Tools for Visual Studio 2008.
Silverlight SDK. # Expression Blend.
Deep Zoom Composer.
JavaScript Helper Files.
Silverlight Dynamic Languages SDK.
http://www.codeplex.com/sdlsdk/Release/ProjectReleases.aspx?ReleaseId=11955