Upgrade Python on a Mac

[Rey Bango]

Hi,

I'd like to upgrade the installed version of Python that came standard
on OS X (Leopard) with either 2.6.1 or 3.0.1. Before I stick my foot
in it, I just wanted to get a better understanding of the process.

If I download the disk image installer from here: http://www.python.org/download/
will it allow me to upgrade my existing version or is it more involved
(eg: making a new build).

I've looked through the python.org page for upgrade instructions for a
Mac and haven't found it.

Any help would be appreciated.

Rey...