Stuck on Simple Stuff

I am on p. 49 of "wxPython in Action" and there are clearly major holes in
my understanding of Python, paths, and importing modules. (Python 2.5,
Windows XP, wxPython 2.8)

The simple line "import images" does not work.

I found the file images.py many times on my computer. One of them was in
the following directory:
C:\Python25\Lib\site-packages\wx-2.8-msn-unicode\wx\lib\editor\
This directory is not in my sys.path.

So, how do I import this file?
Is there a chapter I should read in "Learning Python" or in "wxPython In
Action" or online that would help me with this topic?
Should I change my sys.path? If yes, how?

Thanks,
Belinda