Xconfigurator-4.9.19.1 lists mga2064w and mga2164w as UNSUPPORTED. This is not correct. At least mga2164w is properly supported. Tested on Compaq Deskpro 6000 by removing "UNSUPPORTED" from mga2164w section of the Cards file.
The 2164w works OK for you with XFree4?
Yes, it does. I believe that even 2064w is also working but I don't have that card right now.
unsupported means not well supported by an XFree86 v4.0.x driver, not unsupported altogether. We ship XFree86 3.3.6 drivers that support it, and this is what Xconfigurator falls back to when it has a choice, and UNSUPPORTED is present in the Cards file.
it doesn't work for everyone...