3. How do I add <insert WAD or SOC file here> into the game?
There are several ways to do this.
1. Use the launcher in the files section and add them into the WAD Files section.
2. Use the console and type "addfile filename.wad".
3. Use a command prompt and type the parameter " -file filename.wad"
Generally, it’s easiest to use the launcher or the console, but use whatever method is the easiest for you.