Scrap,
Widescreen monitors will work in AH, but there is a penalty. I have a Dell 2405 and have run Aces High in 1920 x 1200 resolution. It looks great, but instead of getting more wrap-around width at the sides, Aces High gave me the same sideways view as 1600 x 1200, but it effectively zoomed in and cut off some detail at the top and bottom of the screen that I previously saw at 1600 x 1200. If Aces High could be modified to give you the same detail from top to bottom as a standard aspect ratio monitor, then widescreen would be an improvement because of the extra information on the sides of the monitor.
Unfortunately, since you lose some top-to-bottom view with a wide aspect ratio monitor, it is less satisfactory for dogfighting. If enough people ask, perhaps Hitech will one day modify the way AH handles wide monitors. Until then, I choose to run my AH with 1600 x 1200 res and black bars on the sides.
There is a file which can be modified in notepad in which you can tell Aces High the resolution you wish to run the program in, but I have forgotten that file name. Someone else can add it.
Check 6,
PapaFox