Dell 1720 with Nvidia 8600 GT, resolution problem

[clau]

Hello,

I just bought $subject, and I have this odd problem regarding resolution: it works fine at 1920x1200, but I would like to reduce it to a smaller value. It is barely possible to read the text like this, and increasing the DPI creates other odd problems.
After 2 days of googling, reading and xorg.conf editing I gave up.
What I've found out is that the monitor reports only one resolution (throught EDID?), that being 1920x1200, and the driver complies.
I have tried other combinations, but it always failed by "black screen" if EDID is disabled, or just starts with 1920x1200 if EDID is enabled.

I am attaching my last Xorg.0.log, and I will provide you with other information if required. My OS is FreeBSD 7.0.

I hope someone can help me, and thanks in advance.

Claudiu.