Find the location of your game installation. You can right click on the shortcut to the game and do properties. Now go to that folder using windows explorer and rename the original .exe file to .bak. Now extract the no-cd version of the file to that folder and then run the game from your original shortcut.
I found the location,i looked at the propertires and i copied the path,then i put it in internet explorer and tryied to set it to .bak insted of .exe but it said it could. so i went to properties and changed it ther but when i did it said the path was incorrect or sommthing. :s