Having unzipped the psom.zip and the mrinstaller.zip files into a 
directory, say C:\temp, do the following:
 
1. If not yet available on your machine install the Matlab Runtime Machine v7.8 
   by running the MCRInstaller in  the C:\temp directory. You must have 
   administrator rights.
   Depending on your Windows system you may have to extend your search 
   path manually. MCRInstaller suggests the pathname which you may change
   (e.g. C:\Program Files\Matlab\Matlab Compiler\v78\runtime\win32).
   (Note that on Windows XP or Vista the installation target directory is 
   automatically added to your path).   
2. Make an application directory (for example C:\Program Files\psom) 
   and move PSOM.exe, the cassini.dat, and the XX2000.dat files to this 
   application root directory. 
3. Test the component by running PSOM.exe. Follow the dialog and use one of the two 
   dat-files with Euclidean metric (input 'euc' or just hit the enter key when 
   prompted) for demo purposes.
   Both demo files contain two-dimensional data that allow you to watch the
   PSOM training.