Ok, I have FSX installed, and I can run it a 5760X1200 in eyefinity mode, but it's like the image is stretched, instead of adding more real estate. Is there anything I need to do? patches or anything. Can't really find anything on google.
Does FSX have a "normal" aspect ratio option under graphics options?
If not, try widescreengamingforum.com. There might be a solution there.
Are you sure your running the game with the 5760x1200 resolution selected under the graphics options instead of 1920?