You can get it here:
http://www.hpssims.com/Pages/updates/up_...NapBat.asp
Brings the game up to the latest PDT file version and other meaningful updates are included:
Changes for Campaign Waterloo 1.04
    - Change so that Infantry can melee attack mounted Cavalry in Obstructed
      terrain.
    - Change so that Artillery Weather effect does not apply to Indirect Fire
      weapons.
    - Added ability to specify that releases cause the units in the specified
      organization to become Fixed rather than releasing them.
    - Added Dragoons to the cavalry types, which can dismount.
    - Change so that retreating units cannot overrun Skirmishers in Chateau
      hexes.
    - Added feature to award victory points for supply wagon losses.
    - Added ability for weapons to be defined as not having bayonets,
      which reduces the melee strength of the units carrying them to
      1/3 of normal strength.
    - Added ability for artillery to be given an indirect fire capability.
    - Added a Supply Source feature that can be used with the optional
      Isolation rule to determine unit Isolation (see Supply section in
      Users Manual).
    - Added ability to put abatis and trenches in a scenario.
    - Added separate Bridge Movement value to parameter data.
    - Change so that three rank units that exceed the Extended Line
      strength value in one hex have their fire value reduced.
    - Change so that Pioneers can deploy entirely into Skirmishers.
    - Added Withdrawal feature which results in units being withdrawn at
      a specified time with a specified probability.
    - Added an Emplaced artillery unit "E" in Order of Battle which cannot
      limber but can change facing.
    - Added option for Mouse Wheel Zoom.
Good job Rich H. and team!