New 24" monitor hooked up with dvi cable only, doesn't seem to provide all the resolution options that analog did. I use the monitor's native resolution for windows, however some games I would like a lower widescreen resolution for. The options all seem to be for regular screen, not widescreen,...

I use a program called Synchpst. Works great in my opinion.

You can check it out here: http://www.synchpst.com/