Applying custom resolutions to E207WFP

[silverwolf0]

I have a Dell E207WFP LCD monitor that came with my cheapo $400 vostro. The monitor is pretty good, but I am trying to get a lower 16:10 resolution on the screen since it will be for my parents and the 1680x1050 is a bit too high. I've updated the drivers but the only 16:10 resolution is the default 1680x1050 one and powerstrip doesn't seem to work as nothing changes when I apply a custom resolution.

Any possible way to do this? Need something like 1440x900 or 1280x800, the usual ones.