how do i creat mod
You download the source code module system
NW MS
www.fsegames.eu/mb_warband_napoleonic_wars_source_1104.zip
You make a fresh copy of Napoleonic Wars mod folder
You edit the copy little by little with hands on learning and studying
You turn what was a copy of NW into a total conversion mod
You always seek to learn more and to ask questions along the way
You prepare to spend countless hours juggling real life (i.e. school) and modding sessions together
You put forth dedication, loyalty, passion to create a modification.
You only need to look at
War of 1812's main thread to know the above is true.
Were you expecting a non-serious answer? Well just for kicks:
tl;dr version