The best thread I have ever seen on Microsoft Voice Command:
http://forum.xda-developers.com/showpost.php?p=2187221
There are cab installers floating around that contain 5.2.19208, which should work for you.
It is commercial software, so while you have a valid license, posting a direct link to the cab (here on PPCGeeks) might put WideAwake and the site at risk.
Best regards,
-boggsie