Is anyone else having a problem with the music in the game? The music will play normally for about 30 seconds then the music will just stop. Then it'll start back up again later until it stops again.
I think this texture pack might have what you're looking for. http://www.realm667.com/index.php?option=com_content&task=blogsection&id=29&Itemid=152&limit=20&limitstart=20
It's the Too Much Brown Textures near the bottom. Great map btw!
Doom Enhanced changes the chaingun sound to sound more like the chaingunner's. I think it also adjusts the sound to fit the rate of fire. It changes a lot of other stuff too but I still recommend it because it's awesome