you do not need to add these to particular project
I use report generator and open cover to generate test coverage results too. This is the script I use to generate the codecoverage using opencover
“C:\Program Files (x86)\OpenCover\OpenCover.Console.exe”
-register:user -target:”C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\mstest.exe” -targetargs:”/noisolation /testcontainer:\”C:\\bin\Debug\.dll\”
/resultsfile:C:\Reports\MSTest\.trx” -filter:”+[]”
-mergebyhash -output:C:\Reports\MSTest\projectCoverageReport.xml
Note that if your argument needs to escape quotes i.e. to pass arguments with spaces to that target process then you can use ", e.g.: -targetargs:"c:\program files"
This is the script I use to run report generator.
C:\ReportGenerator\bin\ReportGenerator.exe
-reports:”C:\Reports\MSTest\projectCoverageReport.xml” -targetdir:”C:\Reports\CodeCoverage”
Hope this helps.