Windows Python install vs. MSI extract question

[cjl]

OK -- this might be a strange question.

If I do a 'full' install of Python on Windows XP, the result is a
directory 'C:\Python25'. Depending on whether I install for all users
or just me, the 'python25.dll' might end up in 'C:\Python25', or in
the Windows system directory. If I copy python25.dll to the 'C:
\Python25' directory, I now should have everything that Python
installs all in on spot, correct?

Now, if I download the Python installer, create an empty directory 'C:
\python' and type the following at the command prompt:

msiexec /a python-2.5.4.msi /qb TARGETDIR=C:\python

Is there any difference between the folder that resulted from running
the installer and the folder that resulted from extracting the MSI?

I put together a portable version of Django (www.instantdjango.com),
and want to experiment with multiple versions of Python on Windows
without running the installer.

Besides the changes to the registry and environment variable, am I
missing anything when I extract the MSI?

Thanks in advance,
cjlesh