an empty square and select "Import Item from File" (or use Ctrl+I). Select the desired item file from your downloaded pack. Save the character file before closing. Method 2: Using Mule Characters (.d2s Files) Hero Editor for Diablo 2: Resurrected
With Hero Editor, you can:
Copy all the .d2i files from your downloaded pack into the Hero Editor\Items\ folder. diablo 2 item pack for hero editor