NVidia GeForce 8400 GS Video Card

http://www.tomshardware.com/forum/652-63-window-monitor-1680x1050-1920x1080-resolution-here
http://forums.nvidia.com/index.php?showtopic=21993&st=20

1. NVIDIA Control Panel > Display > Manage custom timings.
2. Click both "Treat as HDTV" and "Allow modes not exposed by the display"
3. Click [Create...]
4. Under Custom display mode values:
    Horizontal desktop pixels:  1440
    Vertical desktop lines:  900
    GDI Refresh rate:  60
    Bits per pixel:  32
    (don't have "Interlaced" checked)
5. Click [Advanced >>]  (by the way this is where I didn't go when NVIDIA emailed me)
6. Under "Back-end parameters":
    Timing standard:  DMT
    Desired refresh rate:  60
    (the rest of the fields are grayed out)
7. Under "Front-end paramers"
    Scaling type:  Display (none)
8. Click [Test]
9. Click [OK]

Beta driver fix for not being able to save custom resolution
http://www.nvidia.com/object/win7-winvista-64bit-301.24-beta-driver.html
http://forums.nvidia.com/index.php?showtopic=189757
Use version 258.96?

http://www.tomshardware.com/forum/54194-3-resolution-higher-native
"LCDs cannot go beyond native resolution. It is phyiscally impossible since due to the specific number of pixel.

What might be happening is the resolution is being down converted back to native resolution or it sets the "usable" desktop space to 1920 x 1080 (or whatever), but only 1440 x 900 is displayed at a time. You would need to scroll to view the rest of the "usable" desktop space." -- works for CRTs though ...

http://answers.yahoo.com/question/index?qid=20070901023705AArlQAA

*Your monitor, Model : L196WTQ-BF is the finest 19" currently offered by LG and your NVidia does not even warm up to do this.

MONITOR:
The LG is a great 19" and 1440 x 900 is not stressing it at all. This is the "Native" resolution which means 1440 x 900 is the "optimum" or "perfect" resolution setting for this monitor. Contrary to popular belief, the maximum resolution can be configured considerably higher. With a bit of tweaking my 19" wide LCD and NVidia GeForce-256 displays 1920 x 1200 just fine. Also, using the 32bit color depth setting actually displays the monitor’s max of 24bit.