Well, just use the draw_character method instead of the draw_face method.
draw_character(character_name, character_index, x, y)
will draw the chrcter in any class that has Window_Base as its super class, so any window class.
But really:
10 seconds to edit a character set into a faceset. 15 seconds max
10*190 = 1900s = 31m 40s
15*190 = 2850s = 47m 30s
Half to three quarters of an hour and you're done. It's probably less time than its taken to post and check on this topic.