[H-GEN] Xorg config question

[List Puppy]

Situation:
HP xw6400 workstation
Redhat Enterprise Linux 4.5
nVidia Quadro FX560  (2 DVI outputs)
nVidia driver version 100.14.13-2
HP LP3065 30" LCD Monitor (3 DVI-D inputs)
ThinkLogical EVS-34 KVM Extender

Problem:
The EVS-34 has a maximum bandwidth of 165MHz per channel.
The monitor requires bandwidth of 245.8MHz at 2560x1600 at 60Hz.
Therefore cannot drive monitor at greater resolution than theoretical
2560x1074 at 60Hz from one video output.

Proposed solution:
Configure X to output 1280x1600 at 60Hz on both video outputs in "twinview" mode.
Connect each video output to a separate channel of the EVS-34.
Connect the two EVS-34 channels to two of the monitor inputs.
Configure X to instruct the monitor to display both inputs at the same time.

Question:
What will xorg.conf look like to achieve this?

Notes:
I'm told that the monitor is capable of displaying multiple inputs
side by side on screen.
Resolution of 1280x1600 at 60Hz uses 122.9MHz bandwidth.
Have been googling this for a few hours now, without success.
Have found lots on dual monitor one view setup, but little on one
monitor dual view setup.
I'm told this can be, and has been, done ... with this exact hardware and OS.
I will be grateful to anybody who answers the question or points me to
a web page with a good answer.

Thanks in advance for any assistance.