SL2Beta1 Installation Failed

If you will install SL2Beta1 tools for vs2008.
You may get the following error.
An Error Has Occurred:Silverlight Tools cannot be installed because one or more of the following conditions is true:1. Visual Studio 2008 RTM is not installed.2. The Web Authoring feature of Visual Studio is not installed.3. A previous version of the Silverlight Runtime is installed.4. A previous version of the Silverlight SDK is installed.5. The Visual Studio Update KB949325 is installed.6. A previous version of Silverlight Tools is installed.To continue, please install or uninstall the appropriate products and run this installer again.

https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=331756

SilverLight2 SDK has been launched

SilverLight2 Beta1 tools for vs2008 has been launched.
You can download it from
http://www.microsoft.com/downloads/details.aspx?FamilyId=E0BAE58E-9C0B-4090-A1DB-F134D9F095FD&displaylang=en

also you want to know more about SL2 from scott - GM of microsoft.
http://weblogs.asp.net/scottgu/archive/2008/02/22/first-look-at-silverlight-2.aspx