Download eRules World War II version 1.9. This is a free demonstration. It is fully functional except that it will not display the WRG rules text and it will not give all combat results. You can click Help then Register to pay for eRules and unlock its full power. Payment is through the Paypal international secure payments service.
This software comes in a self-extracting package designed to install eRules on your Windows Vista or Windows 7 computer. You will be asked whether you will allow it to make changes to your system. You may need to ask your system ‘administrator’ to do this for you if you share your computer with someone else and you are not the ‘administrator’ yourself.
To protect your system, you should always scan .exe files that you download from the web. Use your anti-virus program.