Bojangles

i have a lcd display with 336,960 pixels at 1440 x 234. How can i set my resolution to be compatible with that? I am using the component video inputs for the lcd(7" widescreen pioneer avx-p7300dvd) and s video outs from the pc (visiontek geforce 3 gts 64mb).
For example, are there any programs that i can run under windows xp so i can set a cusom resolution? also what resolution would be most compatible with a 336,960(1440 x 234) pixel display at?

Thanks in advance
marc