GaussSum requires Python, which is a programming language commonly used for scripting.
Go to the Python 2.4 install page. Download and run the Windows installer, Python-2.4.3.msi. Install it into something like C:\Program Files\Python2.4. (Note: GaussSum also works well with Python 2.3)
GaussSum requires Numeric, which is a Python extension that allows efficient matrix algebra.
Go to the Numeric download page. Download and run the Windows installer, Numeric-24.2.win32-py2.4.exe (for Python 2.4) or Numeric-24.2.win32-py2.4.exe (for Python 2.3).
In order to create .png images, GaussSum requires the Python Imaging Library, which is a Python package that allows image manipulation.
Go to the PIL download page. Download the run the Windows installer, under "Python Imaging Library 1.1.5 for Python 2.4 (Windows only)" (for Python 2.4) or "Python Imaging Library 1.1.5 for Python 2.3 (Windows only)" (for Python 2.3).
The scripts can be found here. Extract the zip file into something like C:\Program Files\GaussSum (note: Gnuplot is included in this zip file in the sub folder gnuplot400).
Create a shortcut on your desktop to GaussSum.py (to do this, right-click on an empty part of the desktop, choose New -> Shortcut, browse to the folder where you installed GaussSum and choose GaussSum.py). To change the icon, right-click on the icon, choose Properties -> General -> Change Icon -> Browse. Find the folder where you installed GaussSum and choose GaussSum.ico. In addition, change the program used to open GaussSum by following these instructions: right-click on the icon, choose Properties -> General -> Opens with -> Change -> PythonW. If you want to set a startup folder, right-click on the icon, choose Properties -> Shortcut -> Start in:, and type the name of the startup folder.
If you have any questions or requests, or if you wish to be added to the mailing list for information on new versions and bug fixes, please send an email to gausssum-help@lists.sourceforge.net.