python, wxpython and Mac OS X

[7stud]

Hi,

I'm using an intel imac which came with python 2.3.5 pre-intstalled on
OS 10.4.7.  I was able run a hello world wxPython script in Terminal
by typing:

$pythonw wxPythonTest.py

Yesterday, I installed python 2.4.4 which I downloaded from the
MacPython website, and it seems to have installed correctly:

$python
Python 2.4.4 (#1, Oct 18 2006, 10:34:39)
[GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin
Type "help", "copyright", "credits" or "license" for more information.

However, now when I try to run my hello world wxPython script in
Terminal, I get the error message:

Traceback (most recent call last):
  File "wxPythonTest.py", line 1, in ?
    import wx
ImportError: No module named wx

Does that mean I need to install a newer version of wxPython?  If so,
I'm not sure how to proceed.  The wxPython download page says:
-----
The Max OSX version of wxPython is distributed as a set of mountable
disk images. The runtime verisons contain Installer packages, as well
as a script that can perform an uninstall of previous installs of
wxPython. (NOTE: If you have versions prior to 2.5.3.1 installed
please do run the uninstaller to remove the older version.)
------
I looked around in Finder, but I can't tell what version of wxPython
that came pre-installed on my imac, so I am not sure whether I need to
uninstall it.

Also, what wxPython download should I install?