C++ and C# Project Settings to Insert in a Project File?

I am trying to avoid hand editing my vcxproj and csproj files in order to include a .targets file. I would like the project files to contain a statement such as:

    <Import Project="$(MyPath)\Xxx.Yyy.targets" />

The project wizards create new projects containing '<Import Project=.../>' in order to pick up recommended settings, and the MSBuild schema documentation covers 'Import Project' syntax.

I have spent a long time going through the Visual Studio 2012 Project properties, dependencies, configuration, build customizations, etc. Does the Visual Studio IDE support this feature, or is my only alternative to hand edit the vcxproj and csproj files.

Thank you,

David Schwartz