Since the model.siz change, you no longer need to worry about model scale for EAW. There is a text file that tells the game how big to make the model. ie. I'm using Hobbes' Kerchan BB as a Rommie PF, Skinman's B'rel FF as a Klink fighter and Thu11's Thunderbolt PF as the Fed fighter. Drop them in the folder, rename the files, and they just work.
I assume that SFCIII had this feature built in, and OP will get it with the next patch. (or did they get it with the last patch?)