Never mind, messing with that just made it set itself to like, Wii-resolution. but normal non-1600x1200 HD actually lets it do widescreen perfectly, not even stretched even though it's 16:10 res, so I guess it all solved itself in the end
Responses
In response to blip #97280
@Pink_Hat: yes, that game does have config setting for widescreen resolution, but it does definitely feel like leftover from Wii which does have 4:3 and 16:9 system level setting, especially considering it's hidden in config rather than in game setting.