if running on python 2.4 (optional, used by the ``ovfconverter`` tool)
- `qemu-img <http://qemu.org/>`_, if you want to use ``ovfconverter``
- `fping <http://fping.sourceforge.net/>`_
+- `Python IP address manipulation library
+ <http://code.google.com/p/ipaddr-py/>`_
+- `Bitarray Python library <http://pypi.python.org/pypi/bitarray/>`_
These programs are supplied as part of most Linux distributions, so
usually they can be installed via the standard package manager. Also