Modifying unit colours via Bitmaps?

[mdsmall]

Hi - In the Icarus mod I am experimenting with replacing the Trans-Caucasian Federation with separate states for Armenia, Georgia and Azerbaijan. I can use the Localization file to change of names of existing countries in the production menu to create these new states. However, I have not figured out how to change the colours on their units
(I use 3-D sprites). Both Georgia and Azerbaijan come up with the same units as the previous Trans-Caucasian Federation, even though their capital cities show different colours.

I understand that I need to go into the Bitmaps to make this adjustment. Can anyone with a knowledge of the graphics functions in this game give me some step by step advice on how to do this? I m not familiar with this aspect of modding.

Many thanks in advance,

Michael