To use Python, enable the PY plugin like any other plugin.
On the forum we sometimes post command xml that loads *.py scripts from a \PY folder. Just create a new subfolder "PY" in your VoxCommando folder. It is not there by default.
http://voxcommando.com/mediawiki/index.php?title=Python#PY.ExecFileYou can actually put the *.py files anywhere, as long as your VC command uses the correct file path where the file is located. It's just a good idea to create a \PY subfolder so that they're easy to find if you want to edit them.