Nvidia FX Go 5200 @ 1920x1200 twinview

apt-get install nvidia-glx nvidia-kernel-source nvidia-kernel-common

Go to /usr/src

tar zxvf nvidia-kernel-source.tar.gz

Go to /usr/src/kernel-source-2.6.10

make-kpkg modules_image
cd ../
dpkg -i nvidia-kernel-2.6.10_1.0.6629+1-1+10.00.Custom_i386.deb

Now for your Xfree86 settings

Section "Device"
	Identifier      "NVIDIA GeForce FX 5200"
	Driver          "nvidia"
	BusID           "PCI:1:0:0"
	Option          "UseFBDev"		"true"
	Option          "NoLogo"                "true"
	Option          "FlatPanelProperties"   "aspect-scaled"
	Option          "UseEdidFreqs"          "on"
EndSection

Section "Monitor"
	Identifier      "Dell Panel WUXGA"
	DisplaySize     330     210
	HorizSync       28-110
	VertRefresh     43-90
	Option          "DPMS"
	# 52.3 Hz refresh, 65.3 KHz, 162.0 MHz
	Modeline "1920x1200" 162 1920 1984 2176 2480 1200 1201 1204 1250 +hsync +vsync
EndSection

Section "Screen"
	Identifier      "Default Screen"
	Device          "NVIDIA GeForce FX 5200"
	Monitor         "Dell Panel WUXGA"
	DefaultDepth    24
	SubSection "Display"
		Depth           1
		Modes           "1920x1200" "1856x1392" "1792x1344" "1600x1200" "1280x1024" \
				"1280x960" "1152x864" "1024x768" "800x600" "640x480"
	EndSubSection
...
...
...
...
...
	SubSection "Display"
		Depth           24
		Modes           "1920x1200" "1856x1392" "1792x1344" "1600x1200" "1280x1024" \
				"1280x960" "1152x864" "1024x768" "800x600" "640x480"
	EndSubSection
EndSection