Just wanted to let you know that I made a small script to allow one to use multiple directory menus / directory hotlists.
I wrote the script for myself and I made it available in case someone else needs it.
You can find it here:
sourceforge -dot- net -slash- projects -slash- set-dirmenu
Sory for the address; it seems I'm new here and thus untrusted

Maybe a moderator can rectify that...
You can find installation steps in the readme.txt file included in the package.
Cheers,
Cristian Vasile Mocanu