To install my patch/tweak settings just goto your steam then library and find your Doom 3 BFG then right click then properties and then select local files then click browse local files.
Once you are within the root directory of DOOM 3 BFG click on @ultimateHD folder then open my rar package then just drag and drop the files within the rar and overwrite everything, click yes to all.
Then enjoy the game!