In case there's seemingly no Ordre de bataille available, I usually flick through the regimental histories (and the like), for instance:
http://www.britishempire.co.uk/forces/a ... hinfantry/
take all the ".htm" and read about the regiments, and you receive the facts
26th Regiment of Foot - defended Laer etc pp.
or German sources, like
http://www.preussenweb.de
at Neerwinden/Landen: IR8, 1 Batt of IR 11, 1st Batt of IR 15 (Garde), Kürassiere 1, 5, 6; Dragoner 1 (stationed am Winkelbach between Laer and Kleine Geete), Dragoner 2
tedious work, but you will find very interesting facts and stories
stay tuned