Because I often re initialise my book.db, I quickly created a tool to automatize the installation / uninstallation for this hack.
It can help those who doesn't want to enter SQL command line too.
Then, this tool contain another trigger option to automatically creating collection with the folder structure of your SD card.
Both triggers can be easily added / removed individually.
tweakDB.zip
Sources are included in the zip file.
Just unzip, double click on start.bat and follow the instructions