Unzip mod file into ie: e:\Diablo.II.Resurrected\mods\mad\mad.mpq Make a shortcut of D2R.exe, add -mod mad -txt ie: "e:\Diablo II Resurrected\D2R.exe" -mod mad -txt,launch game and play offline.
Updated for 2.4 patch..... with monstat.txt, enable boss in nightmare and hell, created by radialman67, put into levels.txt same folder...