Hurray! Finally got ASP.NET 3.5 Extensions CTP uninstalled

If you are having problems with uninstall , your solution may be described here http://www.dotnet-friends.com/techreview/web/asp/general/6dfcb02342c44986bbf23f759b4b4824.aspx.

Although my case/issue was different, I had to uninstall VS 2008 SDK first and after that uninstall of Extensions CTP ran smoothly.

So now I can proceed with install of VS 2008 SP1 Beta 1 and .NET 3.5 SP1 Beta 1: http://weblogs.asp.net/scottgu/archive/2008/05/12/visual-studio-2008-and-net-framework-3-5-service-pack-1-beta.aspx