AFAIK there is no SDK for TH2Go. All that is needed for TH to work is having the game HOR+ i.e. if you change the resolution it just adds the extra pixels. From what you have described the game is VERT-, meaning the games engine zooms in (loosing vertical FoV) if the res set is WS. Obviously with TH this is really really bad, it makes many games unplayable.
see here
To change the engine to HOR+; I don't know bevause I am a software numpty. However even when games have been released VERT- (like, famously, Bioshock) clever people out there have worked out hacks/fixes to sort it out. Like
Racer_S