I'm currently trying to migrate an application from Microsoft's TFS to IBM's Rational Team Concert (RTC). The application is currently being built using MSBuild through TeamBuild in TFS with the TFSBuild.proj file. I'm wondering if it's possible to use this file for builds in RTC? I can build the project by specifying the Visual Studio solution file (*.sln), but I'd like to do it by reusing TFSBuild.proj file if possible.