GPL is widescreen via blacking out the top and bottom of the full
screen resolution, Someone was able to hack the graphics DLLs for GPL
to provide extra resolutions that could, combined with FOV adjustments,
make them work in widescreen. Check the rscnet forums.
Unless someone has done the same to N2003 I don't think it offers any
resolution your monitor can display apart from the standards (though I
may be wrong). GTR is more likely to support it - I do seem to
remember F1C specifically supporting the panoramic resolution of the
Matrox triple-monitor cards w/o any special hacks.
HTH,
Kendt