Resolutions...?

[Slanzinger]

Is there any way of playing the game in any resolutions apart from those listed - e.g. any command line switches I could put into the game shortcuts? I'd love to be able to play it in widescreen, if only to avoid that moderately "stretchy" look 4:3 games get on 16:10 monitors. (1680x1050 would be the ideal)
Cheers in advance.