I doubt that there is a software/driver solution. As you have noted, Mac are pretty good at detecting monitors and offering resolutions.
You may be able to get more resolutions out of your system by buying a better video card, but probably not worth the money.
Is this an ADC display? [Apple Studio Display 17 (ADC) - Technical Specifications, http://support.apple.com/kb/SP57] . ADC displays were[are?] high performance machines. However, I have known several techs who got ADC displays from friends and can't use them, not even with their Apple computers and Apple NON-ADC video cards.
A friend just gave me an Apple 17" LCD Studio Display. It doesn't have any controls on it, no buttons except power. It was bought with new with a Dual Core 1000MHz G4.
I don't have any software disks that may have come with it.
I use OSX 10.4.11 almost all the time, and I can set the resolution via the Displays System Preference panel - I get all the resolution display choices.
But I still use OS 9 for a few programs, and in OS 9.2.2 only the 1280 x 960 (maximum) resolution choice us available in the Monitors Control Pane or Control Strip. It's a bit small and I wish I could make it 1024 x 768.
Does anybody know if this is resolvable?