You cannot do this in the editor, but you can by creating new folders and files in the ..\data\images\units\ folder of EoS.
Here are a couple of examples.
(new infantry unit to the right)
This was simply done by copying the entire ..\data\images\units\infantry folder to ..\data\images\units\infantry2, and then batch process all the png files in Paint Shop Pro in order to change the color of all the files. This means I also get to keep all the nice animations. NB! I found out that it was smart to rename the files as well, since having the same name as the original files seemed to confu
