can someone post a step by step for backing up a true copy of WC3

what was the trick you used with WINISO?
My Warcraft 3 copy is not 1:1 is there a way I can fix it so I can use B.net? Isnt the War III.exe the only file that has the copy protection in it? I think I need a 1:1 copy of the war3.exe then WINISO right?