This is to be done in DOS or in DOS window: 1. Go to your boom directory and make a sub-directory called WOLF 2. UNZIP 2nd_enc.zip to this new directory 3. Type following lines when you are in your boom directory (note! replace "c:\doom2" with your DooM 2 directory): copy con 2nd_enc.bat boom -iwad c:\doom2 -file wolf\2nd_enc.wad -deh wolf\2nd_enc.deh -save wolf 4. Press F6-key and after that enter-key 5. Type 2nd_enc to play it!