Silly question re WCIII No-CD Install

[Natus]

The instructions for the install of the No-CD install for WCIII are quite simple. However, I can't seem to get my mind around them.

Could someone explain to me just how I replace the original war3.exe with the original? I'm just about there, but don't see how I can replace one with the other. Same with extracting War3.org dummy exe to the directory. I've downloaded the executable Archives and extracted the folder, but how do I begin replacing?

I know I sound like a total computer newbie, but I simply haven't ever used cheats or no-cd executables before.

Any advice would be appreciated! Thank you all!

Nate