Instructions
Open the Mod Manager installation file. Click "next" to progress through the installation, selecting the "Diablo II" directory when prompted.
Click "install," then click "finish" once the installation is complete.
Navigate to and double-click the mod plug-in you want to add to Mod Manager. Click the button next to the directory to browse, then select the "MODS" folder in your "Diablo II" directory.
Click "OK" and "Extract" to place the mod files in the appropriate directory.
Open Mod Manager, then click the desired mod from the list in the center of the window. Click "Start Plugin," then "Start D2" to load the game.