Monitor Resolution option missing

[Biohead]

I've recently purchased a new monitor/HDTV that will also be hooked up to my laptop at home. It actually supports a resolution of upto 1280x768, but Vista isn't letting me select it, and neither is the shoddy Intel GMA software. If I open up the intel software and go to properties of the monitor, I can see that 1280x768@60Hz is a valid resolution.

I intend to run an Extended Desktop setup, and my gfx are intergrated GMA 900 - yes I know its bunch of crap and I'm running XDDM drivers.

Is there anyway I can force the resolution of that monitor (I don't want to change the res of my laptop screen though), through the registry?