Amusing, I've seen other ports to be kind of worse (deus ex 2).
While there's no builtin support via .ini editing: it picks from predefined resolutions inside the data files somewhere, they may be found/editable with time and patience which I lack.
However I did get it to run in 1920x1080 via Racer_S's Just Cause fixer seen here:
http://www.widescreengamingforum.com/node/6795
And interestingly this 'crap port of an old game' actually does widescreen fine, horizontally adding to the new resolution, no fov editing necessary.
original 1280x1024 chosen (highest available in-game)
same ingame choice, override to 1920x1080
I'll take tips on how to post images to this, first time I try attaching any :).
Oh and oddly enough, the overrider also somehow crippled the ad showing, not that it was intentional either.
Since this one works I wouldn't be surprised if the softth could be used to do this as well, just disable the sides to just increase res.