Great Game for COH: Applications for advanced gamers
On the main window, we can find the tab "configuration" to customize keys by clicking on the faction you want to configure. In this case "americans"

A TXT file will be open, on it we will insert the keys we want to configure between the :: at the end of each line.
Yellow arrow shows the COH command.
Blue arrow shows the location where we have to input our new key.
Once configured, we will save the document by clicking on "file" and then "save".
Now we can close the TXT file.
On the next option we will enable/disable if we want to use the special vehicle movement option , we will select it by checking or unchecking the following box.
Finally, click on the army button we want to activate from "army selection" on the left side.

And now we can run "Company of Heroes" to check our new configuration.
ATTENTION: if you want not to modify a default key, simply do not assign a function. Do not dupplicate keys because it will only recognize one, do not change the lines position on the TXT or the program will pop-up an error.
If you get an error you can always restore the default configuration by clicking on the "restore original" or "restore backups" tab.
J&M SofTeam