I always make copies of everything for my own personal use. I scan everything that comes in a box to digits, print it and use it instead of the originals. Here what you need to play a game from the OSG LIBRARY OF NAPOLEONIC BATTLES. All photos from Napoleon Invades Spain (NIS).
The Map (can't copy that) This is a small map from NIS, the Battle of Vimiero.
Misc Counters and Markers
Rule Book. Current PDF, printed and bound
Study Folder (Game specific rules and scenario setup instructions, scanned, printed and bound.
Turn Record Charts, Unit Roster/Setup cards, Reinforcement chart (home made), weather chart, victory worksheet. The originals are colored, I print them to keep from spilling coffee on the originals.