Hard to find but to install OCS 2007 speech server SDK you must go to:
Uninstall any early versions of MSS SDK 1.1 and any OCS 2007 beta or later OCS releases.
Download SpeechServer.exe size of 427.8 MB takes 20min on a high speed link.
Expand into say C:\OCS2007SpeechServer and open the Prerequisites folder. Install all four items if not already installed. Also install the Hotfix and the Business Intelegence Tools from their folders.
Then install Visual Studio 2005 extensions for .NET Framework 3.0 (Windows Workflow Foundation) from http://www.microsoft.com/downloads/details.aspx?FamilyId=5D61409E-1FA3-48CF-8023-E8F38E709BA6&displaylang=en make sure that you do not load any beta software first since uninstall does not clean things up and speech server will not install with any OCS 2007 beta software!