Hi

FYI - for some insight on Ney's thinking on this matter

Michel Ney (duc d'Elchingen) (1833) Military studies (Translated GH Caunter)
http://books.google.com/books?id=naQfAAAAMAAJ

Page 79 = "The corps-d'armee shall march, so far as the nature of the ground will permit, by platoons or divisions, at half distances, and even in columns of half-battalions or battalions, if the country should become more open, and when the position which the army is to occupy by a rapid attack requires that it should form into line of battle with great celerity. ... The battalions shall maintain a distance of twenty toises from each other, the regiments a distance of sixty toises, and the brigades a distance of a hundred and twenty toises."

Assuming that Neys thinking from 1805 has not changed, then it may be that some (perhaps all) the battalions may have been deployed in line. Perhaps along these lines. Although some may have obviously changed to columnar formations as best suited the circumstances.

Regards
Scott