Dual Displays and Gaming

[Thomas G <debian@staff.lan-zig.com>]

I have been using Dual displays for some time now but whenever I go to 
play a game like ut2004demo i get in half on one lcd and half on the 
other. This creates issues taking in mind that my crosshair is split but 
1 inch of screen gap. Is there a way I can fix this problem without have 
to edit XF86Config-4 (to disable one of the monitors) and restarting X 
everytime.

Thanks like always,
Thomas