You will have to have hacked your 500 first and apply the Open4All RP+ patch, then delete:
C:\private\10003a3f\import\apps\Sweat_reg.r*
C:\private\10003a3f\import\apps\Sweat_reg.rsc
C:\private\
20029b71 <- Delete this folder
C:\private\2002AC7F\import\weatherservice.xml
C:\resource\apps\Sweat.mif
C:\resource\apps\Sweat.r*
C:\resource\apps\Sweat.rsc
C:\resource\qt\plugins\serviceframework_weatherplugin.qtplugin
C:\sys\bin\serviceframework_weatherplugin.dll
C:\sys\bin\Sweat.exe
C:\sys\hash\serviceframework_weatherplugin.dll
C:\sys\hash\Sweat.exe
To kill the background Weather service in the firmware:
Get
iChris701's Weatherpublisher mod here.