How do I force a certain display resolution?

I've had this nagging issue with my Mac Mini both under Tiger and now Leopard where the display resolution is not quite right. I have it connected to a lower end Polaroid FLM-2601 LCD TV and use it function in my entertainment center as a home theater computer.
Now the problem is that the panel supports 1280x768@75Hz via VGA and 1360x768@75Hz via DVI. Now I can attach a monitor and get the resolution I am looking for via either VGA or DVI. Then I unplug the monitor and connect it to the TV and it works just fine at the supported resolutions. However, as soon as the Mac Mini sleeps or restarts it goes to odd resolutions or 74Hz and no picture is displayed. I tried this with an old PowerMac G4 and it just works right. The video chipset or driver in the Mac Mini seems to be the issue with this TV.
Is there some way to override Mac OS X and force a display resolution? Otherwise I end up with a very notchy experience.

I've had some luck with DisplayConfigX - google it. I've only ever used it under Tiger, though, not Leopard. Using it to drive a Vizio plasma screen at a resolution not typically shown under the Monitors control panel in Tiger.

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