What is the difference between the DKII.exe and DKII-DX.exe executables included in the GOG download?

Also, do the old -softwarefilter and -32bitdisplay command line options help with the GOG version of DKII?

And finally, I cannot find the full DungeonKeeper2\config.ini file. The only one I found, at %APPDATA%\GOG\DungeonKeeper2\config.ini, has only one line in it, not the full file I expected with all of this stuff:

[Video]
Antialias=11 ;Controls antialiasing and also the fps fix for the main menu. 0, 1, 2, and 12 are also valid settings.
ExtraAntialias=0 ;Doesn't do anything on any graphics card less than 10 years old, afaik
HighRes=0 ;Allows you to pick higher resolutions, at the expense of broken menu text
Anisotropy=0 ;Adds anisotropic filtering on textures
Vwait=1 ;Controls vsync behaviour
ScaleMode=1 ;Controls screen scaling behaviour, particully if your screen isn't 4:3
DisableFourCC=0 ;Disables some specialised texture formats, which may solve crashes on some graphics cards at the expense of corrupting movies.
Bumpmap=0 ;Enables bumpmapping effects on water/lava. I have no idea if it looks like it's supposed to though. I prefer the original water.
RealFullscreen=1 ;Set to 0 to run in a fullscreen window. Can help with alt-tab crashes, but can have some side effects.

[Misc]
CpuIdle=0 ;Turn up if you don't want it hogging 100% cpu time
;Not really any advantage to changing any of these
SingleCore=1
DisableDEP=1
RestoreMode=0
NotOnTop=0