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