SoftTH (DX9 x86). Edit 2 files in (path-to-game)\UDKGame\Config. 1. UDKSystemSettings.ini: AllowSecondaryDisplays=True, SecondaryDisplayMaximumWidth & ...Height= your side resolution (fixes mouse oddity). 2. UDKEngine.ini: Switch AspectRatio_MaintainXFOV to ...YFOV. In-game fullscreen & select massive resolution. FOV slider in game settings, Advanced. Default FOV is bit strong.
(PLP screenshot with bezel effect, default FOV)