Unpack the zip-file, then simply copy everything from "aow2pack" folder to the aow2 root folder (smth like c:program filesage of wonders - shadow magic), overwriting all files, of course.
don't forget to backup files if necessary.
The full list of new and changed files is inside the zip in the "dagnar_readme.txt"
This mod replace your "default resources", so you don't need to choose mod name in aow2setup and use only exclusive maps.
To uninstall mod, copy all backup files instead of changed, or simply reinstall the game :)
A fully functional modification to aow2-SM, many units, abilities, spells etc were changed, remade, even added. Over 25 new units. Every change was polished by uncountable MP battles...