A possible fix...
Since Ergo hasn't replied, I decided to go ahead and see what i could to do myself. I downloaded another mod and found it worked perfectly. While i have no experience creating batch files i used the working mods batch file to create one for Ergo's Fixpack. I left the specific lines the I figured unpacked the mod the same and mirrored the rest the best i could. This is the batch file i came up with:
:: Title of the mod when the batch starts
@Echo == Installing Item-Mod: "Ergo's Fixpack" ==
:: sub-folder where the SQL-files can be found
@Set mod=Ergo's_Fixpack
:: filename appendage for the backup copies
@set backup=.ergo.bak
::--------------------------------------------------------------
:: Nothing needs to be changed below
::--------------------------------------------------------------
@echo off
echo.
set pfad=.
if not exist %pfad%\static.db4 FOR /F "tokens=2* " %%A IN ('REG QUERY "HKCU\Software\DTP\Drakensang" /v target_folder') DO SET Pfad=%%B\export\db
if exist %pfad%\static.db4 goto okay
Echo The path to "Drakensang\export\db\static.db4"
Echo couldn't be read from the Registry!
Echo.
Echo To install, please copy all the mod's files and folders
Echo to the folder "Drakensang\export\db\", and start
Echo "Install-English.bat" again there.
Goto End

kay
FOR /F "tokens=2* " %%A IN ('REG QUERY "HKCU\Software\DTP\Drakensang" /v version') DO SET version=%%B
Echo Drakensang v%version%
Echo Datenbank-Directory = "%pfad%"
echo.
echo Following languages are available: (E)nglish and (F)rench
set /p mod_lang="Type:"
if /i %mod_lang%==e (
ECHO English language selected.
) else if /i %mod_lang%==f (
ECHO French language selected.
) else (
ECHO Invalid selection. Aborting mod installation.
goto End
)
echo.
echo Creating backups...
if not exist %pfad%\static.db4.(%version%)%backup% copy %pfad%\static.db4 %pfad%\static.db4.(%version%)%backup%
if not exist %pfad%\locale.db4.(%version%)%backup% copy %pfad%\locale.db4 %pfad%\locale.db4.(%version%)%backup%
if not exist %pfad%\game.db4.(%version%)%backup% copy %pfad%\game.db4 %pfad%\game.db4.(%version%)%backup%
echo.
echo Updating %pfad%\static.db4...
%mod%\sqlite3 %pfad%\static.db4<%mod%\static.sql
echo Updating %pfad%\locale.db4...
if /i %mod_lang%==e %mod%\sqlite3 %pfad%\locale.db4<%mod%\locale.sql
if /i %mod_lang%==f %mod%\sqlite3 %pfad%\locale.db4<%mod%\locale_french.sql
echo Updating %pfad%\game.db4...
%mod%\sqlite3 %pfad%\game.db4<%mod%\game.sql
echo Copying new icons...
mkdir %dsroot%export\textures\icons
mkdir %dsroot%export\textures\armor
copy %mod%\textures\icons\*.* %dsroot%export\textures\icons /Y
copy %mod%\textures\armor\*.* %dsroot%export\textures\armor /Y
copy %mod%\game.ico %dsroot%\ /Y
echo.
Echo Installation finished.
:End
echo.
pause
This worked for me on windows 7 32bit. This should also work with French. I have only tested it on English. Essentially you have to extract the mod files into your Drakensang\export\db\ folder and then run the batch file. Hope this helps.
P.S. Ergo perhaps looking the above batch file may give you some insight why the errors are occurring with so many ppl.