Installation Instructions This TC Requires the latest version of ZDoom.
Currently this is only available on the ZDoom SVN.
A compiled version is available here.
1. Open the .zip file that you downloaded here, and drag the 'Wolf3D_Demo' folder into your ZDoom folder, so that your directory structure looks similar to 'C:\Games\ZDoom\Wolf3D_Demo'. If you want to install Spear of Destiny, put the contents of that .zip file in the same folder.
2. Navigate to the newly-unzipped 'Wolf3D_Demo' folder and double-click 'Wolf3D.bat' or 'SoD.bat', depending on which game you want to play.

This file will automatically create a copy of your current ZDoom .ini file, or a new .ini file if it is unable to find your current one.
You can modify the path in the .bat files if it doesn't find your .ini.
The Wolf3D.cfg settings will be applied to this .ini file, so that the .cfg file will not overwrite your regular game settings.
Notes: You can use any IWAD with this TC, however, you may end up with some odd colors in areas. The TC comes with its own minimal IWAD that will be loaded automatically with the .bat file.

If you don't want to use the .cfg file, are uncomfortable running strange .bat files on your computer, or are a Linux user, something similar to the following commands should duplicate the .bat file for you:
First, copy your zdoom-USERNAME.ini to Wolf3D.ini
Run zdoom -config Wolf3D.ini +exec Wolf3D.cfg -file Wolf3D.pk3
Be sure to include the path to each file.

Some examples:
Linux:
$ cp ~/.zdoom/zdoom.ini ~/.zdoom/Wolf3D.ini
$ zdoom -config ~/.zdoom/Wolf3D.ini +exec ~/.zdoom/Wolf3D.cfg -file ~/.zdoom/Wolf3D.pk3

Windows/DOS Command Prompt:
copy zdoom-MyName.ini Wolf3D.ini
zdoom -config Wolf3D.ini +exec Wolf3D_Demo\Wolf3D.cfg -file Wolf3D_Demo\Wolf3D.pk3