Try knoppix screen=640x480 for a start.
That's what I'm stuck at so far.
When Xwindows starts in KDE, I have 3 overlapping images of the screen tiled horizontally across the screen, if I try 1024x768.

My monitor is an HP D2804A Super VGA, and I have no idea what to use for H and V refresh rates, they're not on the back.
I can get 1024x768 24 bit color in Windows 98SE and the Mandrake Live CD, but neither of those tell refresh rates either.