It would be useful if WW would support user processing after installing the WW update and prior to starting WW.exe.
I keep my map.ww additions as a separate file which makes it easy to merge with the WW install version. A simple .cmd file merges my file with the WW file and it would be very convenient to have the WW update install execute that .cmd file before restarting WW.exe.
A generic approach would be to test for the presence of a .cmd file named WWpost.cmd and if found in the WW folder executed. End users could then customize such a file to fit their individual needs.
FWIW
maps.cmd @echo off
title Add My maps
ren Maps.ww WWmaps.ww
copy MapsMine.ww Maps.ww
copy Maps.ww+WWmaps.ww Maps.ww
if errorlevel = 1 echo Map update error&pause > nul
MapsMine.ww"Mine","",""
"","NE Radar","http://image.weather.com/web/radar/us_ne_9regradar_large_usen.jpg"
"","USA radar","http://www.intellicast.com/WeatherImg/RadarLoop/usa_None_anim.gif"
"","TWC Beta Satellite Map","http://image.weather.com/web/flash/FMMain.swf"
"","TWC - Microsoft Virtual Earth ","http://image.weather.com/web/flash/FMMain.swf?&lat=42.2454&long=-78.2725&viewPortWidth=600&viewPortHeight=405&initialWeatherLayerType=radar&initialZoomLevel=6&wxAnimateOnStart=true"