http://**LINK_DISABLED**/sn8X0 - 2Shared
http://**LINK_DISABLED**/sn8sU - Mediafire
I was looking for a mod like this, and the only link I could find has died so I decided to make one myself.
I'm very new to scripting and had to spend few hours of study to make this simple script. Please understand its limitation.
As you see, it's a very straight forward addon, and should have no compatibility issue with any other mod.
Spoiler:Default key is "n", you can customize it in the menu.
Reference mods:
1. http://**LINK_DISABLED**/sn9LL - Doomguy visor mod
2. http://**LINK_DISABLED**/sfclq - Brutal DooM (Nuff said)