Installation Instructions mod D3HDP - DooM 3 Essential HD Pack
Extract the archive and move the contents of the D3HDPack folder to the root directory of the game. Don't forget to configure the screen resolution in the DoomConfig.cfg file or use the Dhewm 3 engine.
(Optional) The file zzz_pak007sikk.pk4 from the base folder is optional — it contains an enhanced version of the main lighting script from Sikkmod 1.2. If you experience display issues when using zzz_pak007sikk.pk4, delete the file and play with the default lighting.
Play!
To configure the screen resolution in the game, follow these steps. All you need to do is add the following lines to the autoexec file or edit the DoomConfig.cfg file (if you are using the Dhewm 3 engine, you don't need to do this):
r_customwidth "1920" (or higher)
r_customheight "1080" (or higher)
r_mode "-1"
r_aspectratio "1" (0 for 4:3, 1 for 16:9, 2 for 16:10/15:9)

