given that the scenario has a very close balance rate as published, I'm not sure these modifications are necessary or even desirable.
www.commandsandcolors.net/napoleonics/ma...l-22-april-1809.html
I can't recall ever even taking the castle, though the village has changed hands. The net effect of a Grenzer instead of a Line is negligible, but the effect of 2 Austrian Leaders could be very significant and unbalancing.