CRU 15kHz possible with NVidia under Win7?

[buttersoft]

My primary crt_emudriver laptop died recently, and i'm hoping to replace it with another that has an NVidia Quadro in it. I use it for testing game/emulators for my cabs and watching old 4:3 SD TV shows, so i only really need one or two SD resolutions on the second display output.

I've set up Custom Resolution Utility, and set up a 480i mode, but it displays a side-by-side double image (so 480p). It says it's at 30Hz in windows, it's the *only* resolution left to that display output as I've removed all the others.

 Is it possible to use Custom Resolution Utility to output at 15kHz from a newer NVidia card under windows 7, or will i still need a dongle like for Soft15kHz?

EDIT: just in case anyone's looking, the answer is yes, it can be done, but at this stage only for Nvidia Quadro cards. There might be a way to emulate an EDID for regular Nvidia cards, and it so, we'd all love to hear about it http://forum.arcadecontrols.com/index.php/topic,152839.0.html