There are two variations of this mod, with some flexibility on mixing and matching variations. The first one is all monochrome (i.e. shades of grey but mostly white) and the second one is color, with the colors for each countries units matching the default color of the units at the maximum zoom level (i.e. the colors from the Counter9x9.tga file).
To use the monochrome version of this mod, copy all the TARGA files (i.e. the .tga files) in the WitE Combined Unit Icon Mod\Monochrome folder to your Gary Grigsby's War in the East\Dat\Art\Units folder and restart the game.
To use the color version of this mod, copy all the TARGA files (i.e. the .tga files) in the WitE Combined Unit Icon Mod\Color folder to your Gary Grigsby's War in the East\Dat\Art\Units folder and restart the game.
Alternate color versions of the Italian and Soviet Union air and ground units are also included.
The alternate Italian color is for use with JMass’ unit mod (which changed the Italians from yellow to dark green) and is located in the WitE Combined Unit Icon Mod\Countries\Italy\Dark Green - For JMass Unit Mod folder. To use this version copy all the files in the WitE Combined Unit Icon Mod\Countries\Italy\Dark Green - For JMass Unit Mod folder to your Gary Grigsby's War in the East\Dat\Art\Units folder and restart the game.
The alternate Soviet Union color is reddish instead of the default brownish color and is located in the WitE Combined Unit Icon Mod\Countries\Soviet Union\Red. To use this version copy all the files in the WitE Combined Unit Icon Mod\Countries\Soviet Union\Red folder to your Gary Grigsby's War in the East\Dat\Art\Units folder and restart the game.
Finally, every countries units are broken down into different folders in the WitE Combined Unit Icon Mod\Countries\ folders. In each of those folders, there is a Monochrome as well as a Color folder (except for Italy which has a Dark Green and Yellow folder and the Soviet Union which has a Red and Brown folder), allowing you to mix and match which versions you want to use for each country. For instance, if you don’t like the colors for the Soviet units (and I can’t say I love either the brown or red myself), you can use the monochrome versions of the Soviet units and the color versions of the Axis units. To do that, you would copy all the color units from the WitE Combined Unit Icon Mod\color folder to your Gary Grigsby's War in the East\Dat\Art\Units folder and then copy the monochrome Soviet units from the WitE Combined Unit Icon Mod\Countries\Soviet Union\Monochrome folder to your Gary Grigsby's War in the East\Dat\Art\Units folder and restart the game.
The type of aircraft is shown in black on the air unit icons. The different types are:
F = Fighter
FB = Fighter Bomber
NF = Night Fighter
TB = Tactical Bomber
LB = Level Bomber
R = Recon
JF = Jet Fighter
T = Transport
Edit: There are four situations (as of ver 1.04.36) where you will see the wrong unit color. Fixing these errors requires changes to the Generic Units database. See post #3 below for how to do that.
1) Hungarian Motorcycle Units will show as German.
2) Italian Motorcycle Units will show as German.
3) Finish 75mm Infantry Guns will show as German.
4) Finish BA-10 Armored Cars will show as Soviet.
Any other situation where you see the wrong color is almost certainly due to errors in the TOE(OB) of the unit calling out the wrong countries units (for instance, see this OOB Errors 1941-1945 Campaign ver. 1.04.36 thread).
Edit 2: I should also mention that this mod includes two icon files that were left out of the stock game (again as of ver 1.04.36), for unit ID: 274 Hetzer(H) (G0274.tga) and unit ID: 336 Marder III(S) (G0336.tga). No changes to the database are required for these icons to be used. In the stock game lacking these icons, these units will just never show up in the popup window because there is no icon file for them.
A sample of what this mod looks like is shown below. The actual mod is in the next post as an attachment as the Matrix forum only allows you to attach one file to each post.

The attachment in this post is the above picture, not the modded icon files! The mod is the attachment in the next post!