I run my games in 5760x1080 (5880x1080 with bezel management) as one continuous game screen across all three monitors. My video card is one single NVIDIA GTX 670 than connects and runs all three monitors as well as my 61" TV at the same time.
I have uploaded pics of what Silent Hill 3 looks like, but it looks much better on 3 screens. As you can see you get a much wider FOV! Click on the link below each picture to see a higher-resolution picture:
http://imageshack.us/a/img811/596/sh3triscreen1.jpg
http://imageshack.us/a/img228/4070/sh3triscreen2.jpg
http://imageshack.us/a/img405/2908/sh3triscreen3.jpg
http://imageshack.us/a/img825/1482/sh3triscreen4.jpg
Anything that is 2D (pre-rendered movies,menus,hud,etc) is stretched REALLY wide. The cut-scenes that use focus or depth of field effects also look a little wierd. SH3's real-time shadows will also look a little wierd. Other than that it runs really well.
You do see some wierd things like Douglas hiding to the side (in a non-rendered area) when Heather walks by Happy Burger, and other things the game developers never intended for us to see.
To get this to work is the same process as running it in 1920x1080,etc..
Just set your resolution to 5760x1080, and your FOV as 0.57 (Width) and 2.0 (Height)