I did manage to find a reference to this monitor in fedoraforums.com which had a copy of what I needed to add to xorg.conf[1], but I was wondering if support for this monitor was available in whatever xorg/system-config-display is going to be in FC4?
[1] xorg.conf settings
Section "Monitor" Identifier "Monitor0" VendorName "Monitor Vendor" ModelName "DELL 2005FPW" UseModes "16:10" HorizSync 30.0 - 83.0 VertRefresh 56.0 - 75.0 Option "dpms" EndSection
Section "Modes" Identifier "16:10" ModeLine "1680x1050" 146.2 1680 1784 1968 2256 1050 1051 1054 1087 \ -hsync -vsync EndSection