Now, please tell me how to install this mod.)))
I installed it, but it keeps crashing when the game starts or when I enter duel mode.

P.S. Sorry for being annoying, I probably already bothered you all :D

This mod includes a smart AI that doesn't work well with many other mods, for example, NHF or NCF. Regarding NHF, there's nothing you can do because NHF has scripts that the .exe (of this mod) doesn't support. However, you can make it work with NCF "easily." Here's the link: http://heroescommunity.com/viewthread.php3?TID=41404 (there's a lot of interesting information there, I recommend reading it).
Or, here are the files that will likely allow it to run, including NCF: http://www.mediafire.com/download/weech8cub7f89s8/EXE.rar
P.S.: You can try installing it on a clean game.