I just installed the game and went to game settings to change my resolution. My monitor is 2560x1440 and the highest resolution option was 1920x1440. If I choose that option, I get really annoying black spaces on either side of the screen and it feels cramped. I saw no option for "widescreen" mode. Only "fullscreen" or "windowed".
Am I missing something obvious?
Edit:
I figured it out!
I went into \UDK\Renegade X Black Dawn\UDKGame\ConfigUDKmenu.ini and added this line:
Resolutions=2560x1440
Below all of the other resolutions, then saved it and ran the game. Found the resolution option in the menu, selected it, and voila! It is running in native res! Awesome!