just as an fyi you can install more than one version of python onto your system.
Code:
root@bt:~# whereis python
python: /usr/bin/python2.5 /usr/bin/python /usr/bin/python2.5-config /usr/bin/python2.4 /etc/python2.5 /etc/python /etc/python2.4 /usr/lib/python2.5 /usr/lib/python2.4 /usr/local/lib/python2.5 /usr/local/lib/python2.4 /usr/include/python2.5 /usr/include/python2.5_d /usr/include/python2.4 /usr/include/python2.4_d /usr/share/python /usr/share/man/man1/python.1.gz
Installing multiple versions of Python on Ubuntu from Source achinghead.com
Preferred way to install multiple python versions on Ubuntu Jaunty - Super User