That Add-In is installed by the Measurement Studio installer. You will need to install minimal Measurement Studio C++ support to get that Add-In. If you are using Measurement Studio for Visual C++ 6.0, I believe that you can minimize what you get and still install the Add-In by unselected all of the items underneath the Measurement Studio>>Measurement Studio for Visual C++ feature in the feature tree (but leave the Measurement Studio>>Measurement Studio for Visual C++ feature itself selected). If you are using Measurement Studio for Visual C++ 2003, enable the Visual C++ .NET 2003 Integration Tools feature.