title: run a batch file from TFS 2010 build
body: <p>After a specific build, I want to run a batch file which has TF.exe commands which do the following:
  Check out a DLL 
  Copy one of the "freshly built dlls" over top of the checked out DLL,
  then check it back in.</p>
  
  <p>I tried setting up an InvokeProcess build activity to run the batch file, but it gets a permissions error when trying to execute the batch file.  </p>
  
  <p>I realize that I can and probably should do this with PowerShell, however, I dont want the headache of signing right now.
  Any suggestions on doing this correctly?</p>