Chris,
Brigadiers change orders for their own brigades on an 8 or more on 2D6, if Prussian, or a 9 or even 10 or more for other nationalities. these are modified slightly depending if the guy is exceptional, or a poltroon.
C-inC's get a +2 to their dice roll, which effectively means they change orders on a 6,7 or 8 or more, on 2D6. I'm sorry if it appeared confusing, but the idea is that brigadiers are less liekly to take the initiative and change orders at will.
Also, you can only make on C-inC roll per turn, and one Brigadier roll - per army. That really limits your order-changing options, and makes it pretty important to have a plan!
The emergency limbering thing was an editing mess-up, and that'll dissapear in the errata. Somehow it was imported from the Napoleonic rules. Our artillery is a lot less mobile, and consequently the guns don't get a last-ditch chance to get away. they have to fight it out or get overrun.
Therefore, please ignore any reference to the emergency limbering rule.
Best Wishes,
Angus Konstam
www.edinburghwargames.com