Alright, I've been working on DRs, making and tweaking them, and for the past day or two, I have been working on adjusting the Quake 4 HUD for TH, this tweak is by no means finished, but it's usable. In theory, the HUD, and menus, and all 2D elements can be adjusted to be centered in Triplehead, but this is much easier said than done.
The nice thing is, this mod, while specific to Quake 4, can be easily done with any other id Tech 4-based game, such as Doom 3, Prey, and possibly even Brink, in fact, Brink might be an incredibly easy fix, but as I do not own it, I can't try.
Anyhow, here is a screen shot, and an initial release, it is customized for my resolution, 4320 x 900, unfortunately, I cannot test this for other resolutions, but I see no reason it wouldn't work, I have packaged it as a separate mod, you can install it by unzipping it to your Quake 4 root folder. It includes the Quake 4 TH AR Fix by Paddy, and a configuration file set for 4320 x 900, customize it as necessary.
Quake 4 TH Corrected HUD
As you can see, it's still a huge mess, the HUD isn't perfectly centered, and everything is very stretched still, in theory, everything could be perfect, but I am flying mostly blind here, as there are very few HUD mods for Q4 or D3. Anyone who wants to tweak this is welcome to, I don't care whether you credit me, but if you have any success, please post it for others to enjoy. If anybody wants to know how I did this, message me on Steam, and I'll explain it best I can.
Steam link: http://www.steamcommunity.com/id/thelolotov/
Whether or not I attempt to refine this fix, i.e. fix the stretching, fix the menus, non-essential HUD elements, loading screens, etc. will be dependent on the interest I see, same applies to fixing other D3-based games, excluding Brink, obviously. I fully welcome a more qualified person taking this project up, but I don't mind working on it.
Something to note, I am fairly certain that the *spoiler alert* Strogg portion of the game has a separate HUD, which I will also need to fix.
Anyhow, download, try it out, let me know what's still broken!
EDIT: Decided to look at the scope for the machine gun, turned out to be an easy fix, but it's not perfect.