Hell yeah!
I found a solution for tripple monitor setup at native resolution. In other words, a solution for problem of not being able to set anything higher than 4095 horizontally.
Out of blue i came up with this idea, why not just try dx9res10, a .dll and .cfg file allowing you to set any resolution you want.
Yeah, it doesn't work with every game, and it can only override the resolution, not AR.
But we can set custom AR in registry, and put our desired resolution in .cfg file and run the game. And it looks like it works!
Somehow you can't natively set a resolution higher than 4095 horizontally, but with this hack it's finally possible.
I tested this on Windows XP sp3, so...
here is the screenshot at custom resolution
5760x1200edit:
it looks like it doesn't work on Windows 8.1.
The game crashes before even properly launching.