You can already do what you ask for fairly easily. All you need is a bat file or perl script to swap in different gnuconfig.ini files.

The shared directory settings are found in a section of the file called [share].

You could have 7 different gnuconfig.ini files which each contain different shared directory settings. Then, you could just copy one in and restart gnucleus everyday. If you really wanted, you could automate the whole thing too.