Do you have any experience in .ini coding? if you don't, it would be very confusing for you.
Basically you have to extract Edain_Data.big, and the vanilla ini.big
fine the vanilla unit command set, and put it in the required Edain building command set.
This is a rough idea (and I mean VERY rough) of what to do.
If you don't know what is ini coding, there's some tutorials online that you can check. see revora forums for some good ones.