title: Python home directory in Windows / Problem with multiple versions
body: <p>I'm using Python 3 for developing and CollabNet Subversion Edge as versioning software. Subversion Edge comes with a little program called ViewVC which is written in Python 2, which is also directly bundled with it. There is a system environment variable called PYTHONHOME.</p>
  
  <ul>
  <li>If it is set to the Python 2 distribution from Subversion Edge, my Python 3 won't start (not even IDLE), instead giving a runtime error messagebox. </li>
  <li>If it is set to Python 3, ViewVC doesn't work.</li>
  </ul>
  
  <p>Is there a way to make both work at the same time?</p>