FS9 doesn't have a widescreen setting - but I've found that it's not a real issue at all - in fact having flown with a widescreen laptop and desktop for a couple of years, I've found that it's preferable to the 4:3 standard (even if the gauges aren't circular).
In any case, it only applies to the 2D panel: the VC and outside views are not distorted.
