Microsoft Visual Studio Test Professional offers manually testing tools with Microsoft Test Manager 2010. Visual Studio 2010 Premium/Ultimate offers automated testing tools. In the picture below I have outlined the features that can be found in Microsoft Test Manager vs Visual Studio. Hope this helps!
Also if you want to install Microsoft Visual Studio Test Professional, you can reference my install instructions here http://improvingsoftwarequality.blogspot.com/2011/04/how-to-install-microsoft-test-manager.html