Use xorgconf or whatever you use to configure X, then edit the config file and replace the video driver with "via", thats all it takes, Id make sure your monitor settings and color settings you want are done correctly, then edit the file.Dont expect much from it though, it isnt very good, it works that about all I can say.
http://www.viaarena.com try there, they might have a driver for you that isnt the generic "via" solution above.