Instructions:

Edit the config.xml file to match your site and server.  There are clear instructions all the way through the file, but for the basic settings all you need is the server path and domain to your web site and the name of your index file.

Upload the files to your server and set up the CRON, or batch file if you're on Windoze.

Run from CRON:
python /home/fotan/www/sitemap/sitemap_gen.py --config=/home/fotan/www/sitemap/config.xml