INSTALLER for Silverlight_Tools fails to detect correct pre-requisites, readme link is broken.
I have VS 2010 SP1 installed, the Silverlight components that support docs indicated were installed with SP1 were NOT present.
A reinstall of SP1 from "Programs and Features" did not restore this.
Upon downloading the SilverLight_Tools.exe setup program, it errored saying:
1) Visual Studio 2010 or Visual Web Developer Express 2010 or Visual Phone Developer Express 2010 that matches the language version of Silverlight Tools 4 must be installed before installation of Silverlight Tools can continue. Silverlight Tools is available in other languages at <url>
I have the English install.