This mod doesn't nessecarily change anything, except it basically censors Danny. The difficulties, weapons, gestures etc. have not been changed, and only the title map, secret "map999", and danny have been removed.
For more details on the mod, please visit:
Forum.zdoom.org
For those that don't know how to install and play the mod.
Step 1.
Download the latest GZDoom engine (g 2.1.1) or Dev Version of Zandronum 3.0 (Zandronum Version 3.0 alpha r160519-2047 is what I use, and I recommend it.)
Step 2.
Extract your doom IWAD's into the folder in which you put your gzdoom.exe/zandronum.exe in. (this means DOOM2.wad, or DOOM.wad) If you bought and installed Doom 3: BFG Edition, Doom, Doom 2, or Final Doom on Steam, your engine will automatically detect the IWADS.
Step 3.
When you made sure that your doom source port works, drag and drop TDOOM Weapons Only Variation.wad on to your engine, and choose your IWAD to play.