How to modify ini for multi-user ?

Several people here are using Controlpadportable on their pc. I would like to put the file Commands.ini (containing the list of codes and corresponding actions) on one central location, so that I can easily update it for everybody at once. I guess this can be done by modifying everybody's Controlpadportable.ini file, but I don't know how to do that exactly. Can someone help out ? Thanks !