I am using Visual Studio 2010 and have installed the Windows Phone SDK 7.1 (http://www.microsoft.com/en-us/download/details.aspx?displaylang=en&id=27570) on my machine. However, several of the Project Templates were not added, such as Windows Phone 3D Graphics Application. I tried doing a Repair/Reinstall, but it did not help. Why am I not seeing these new templates, and what can I do to install them? Thanks.