[newbie] Matrox G200 in Mandrake 5.3

[Nick]

I have a Matrox G200, and in KDE under Mandrake 5.3, the best I can get is a
virtual desktop with low resolutions.  I want to use the SVGA server with
1024X768 and 32bpp.  I cannot figure out how to fix this, I have tried
editing the XF86config file but have had no luck.  Any ideas?

thanks
Nick