Use the latest version of winrar or 7-zip
extract the rar file to where ever you prefer ,example C\Program Files
Go to the folder and double click on the IGI 2 .reg file >>press yes ,then ok <<then double click on the [make desktop icon ] File..
Start the game from the Desktop....
Simple as that...
>>When you no longer need the game on your system > delete the extracted folder and the desktop shortcut<<
Use the directx9websetup file to update your derictx9 >If needed<