The update to version 1.4 is out which brings HD textures for all maps.
You can download the full release and the update from here Borderworlds.maginot.eu
If you download the update use the cleaner AFTER you unzipped the files into the correct folders: Start DarkGray-Borderworlds.exe and hit "clean" or start "MC2XClean.bat" manually. Or the game might crash on loading a mission!
As this is an update where images tell more then words. Here are some comparison shots: