Thanks for the update, tricky. (Unplayable, really ?)
I only just installed the game and support appears to be native (TH2G). The game did start at 1024x768 using my native AR (48:10), so getting into the options menu was a bit of a challenge, but now the AR & FOV are ok and I didn't edit a single file. Which makes that sniper scope bug even more of a bummer... :nudgenudge
I was (off-topic) talking about Splinter Cell Double Agent, which I did not see any posts that anyone had got it working triplewide, and how the Sniper zoom does not work properly (not centered, solid black oval, cannot see target), I have not tried Conviction yet as I wanted to finish SCDA first. I am probably 50-60% done with SCDA and enjoying the game a lot (though using a visual walk through as I have no idea how people played this game without a hint here and there). So far only had to use the Sniper Zoom at one part of the game, so have played the rest of the game triplewide. It does crash to desktop quite often with C++ Run-time errors, so make sure you F6 (quick-save) often.
Will definitely play Conviction once I complete Double Agent...