They should start using 3200 by 3200 px textures for small pebbles; you'll only see them in full resolution when you get them in your eye, and by then you probably have more serious problems (such as being blind and not seeing anything).

Gah, it's the Kids in The Hall Citizen Kane sketch all over again! Seriosudly Codagh, people keep trying to help you and you keep reiterating that everyone's ideas are no good because YOU think you know what you know and no one can be right with a differing idea because YOU "KNOW SO" about your system. Just give everyone the information they want and allow them to help you if they can, and at least pretend to consider their ideas if they sound even somewhat plausible.......GAHHHHH! :\
5k resolutions? I call bullshit mang......I mean maybe it'd work but wouldn't the image be shit in some way(tiny/etc) as a result?

Also what frequency was that 5k mythical res running at?

The process is called downsampling. I let the LCD scale the high res image but aspect ratio scaling works aswell to get a clean, almost jaggies-free image. It's similar to Full Image Super Sampling.
First you'd need to modify the EDID informations of your LCD to open up the supported limits. Then you proceed with adding custom resolutions: make sure the native res is correct then in the timings sections you set the default to "Manual"(although for higher resolutions you'll have to experiment with the different settings). Now you set your desired resolutions, again you'll have to tinker around with the various settings (total pixels value and refresh rate are the important ones, active pixels should always be set to the native res).
The process is pictured and the thread on how to do this can be found [url=http://www.forum-3dcenter.org/vbulletin/showthread.php?t=454129]here (in German! there are some short videos describing the process but the most helpful hints are given in the replies unfortunately).
I'm not on the comp I tried this on right now but I think the refresh rate was around 25-30Hz, operating the desktop gets a bit tiresome in that res but games look pretty awesome! You have the Aliasing almost gone without even having AA set, a good GFX card is recommended since rendering at those high res puts much strain on it.

Of course it will, imagine it like you're creating a virtual Screen with a 5k something x res. The GFX card will need to render the images at that 5k something resolution. The pictures get sent as is to the "low res" LCD which are then scaled to native res. So you get quite a performance hit with rendering at such a high resolution.
Here are a couple of shots I really like using that technique:
Crysis at 6,400 x 4,000
Stalker
Stalker COP (German)

Damn....those first Crysis shots are fantastic......and btw it says you can downsample in that game by just changing the r_width and r_height via the console when you play....does this mean that game doesn't need any monitor/etc settings editing beyond the console commands?

No, you still need to set your custom resolution. Ingame via the console you can then force the game to run at your specified resolution but I think it will also get displayed in the settings menu? I'm not sure. If you enter a res in the console you haven't created in your GFX card control panel, then the game will deny it anyway.
BTW Crysis has a tiledshot command that works similar to the one in UE3, problem are annoying lines on the picture if you have a specific postprocess feature enabled. I fyou do photoshooting in Crysis I recommend doing it with the Editor, it's faster and better in some way (I need to get into these things again because I don't remember half of it anymore. I know though that i switched to the editor because it was more comfortable to get your holiday shots)

Damn, I really wish I knew what I was doing with this sort of thing then. All those instructions look complicated ta me.

And it being in German doesn't help much either :/
Once I have some time I might look into making a tutorial about it on here.
Speaking of tutorial, I once made one about the music in Empire Earth but couldn't find it on the subforum anymore :( Anyone knows what happened? I wanted to check it out for the links and stuff...

EDIT:
I pondered your question some more and now I'm not sure anymore. I think in windowed mode you can enter any resolution you like, therefore you don't need to do the downsampling hacks. This would obviously only be useful for taking screenshots, for actualy gameplay you'd need the downsampling approach.

First of all, I never asked for help. Secondly, I don't think I know, I do know of what I speak, more so than anyone else who has not had to deal with this hardware setup for as long as I have. I have tried every possible variation on this and I have found the only method that works for me and my hardware and I am happy with it. I did not post this thread to find solutions to a problem that I have already solved to my satisfaction, I started it to get people's thoughts and opinions on widescreen gaming with old games, no more, no less.

I always wonder, are widescreen monitors with 3:4 support that rare? In my case, if I want to play 3:4 game, i just push the button on my widescreen monitor and voilá, i have 3:4 no stretching.

The other thing is, I am actually so used to 3:4, that I don't even like widescreen, the display seems a bit stretched near the edges in some games, it is kind of unpleasant for me.