You could also borrow a real disk and complete these exact instructions:

1. Extract d2loader.zip onto desktop

2. Open Diablo II directory and rename Diablo II.exe(Original) to any different name **example** (Diablo2.exe)

3. Open d2loader file and copy Diablo II.exe then paste into Diablo II directory

4. Copy from classic disc these 2 files: d2char.mpq, d2music.mpq into Diablo II directory

** These 2 files from classic might have already been installed into directory, if so don't over write skip to next step


5. Copy from expansion disc these 2 files: d2xmusic.mpq, d2xvideo.mpq into Diablo II directory

6. Remove any Diablo II disc's from drive

7. Double click on new shortcut and Diablo should load without cd