Ok, basically what you want to do is first make sure AHK is installed, there's no need to run it beforehand, just having it installed is enough. After that, make sure you've replaced the default Dwarf Fortress.exe with the one in the download, or alternatively make the hex edit as directed in the readme, whichever you prefer. After that, just unzip the download anywhere and run launch.ahk to start the script. Then, you'll see mouse.ahk hanging out in your tray, and all the functions will be enabled. If you make any edits to menus.txt, keys.txt, or config.ini, make sure to rerun launch.ahk.