Yes that is correct.  I've written a few MIDI posts a while back that describe this as well as preset switching over MIDI, sharing expression PDL over MIDI, etc.  The general idea being that one factor pedal can be a controller for all the others.  If you search for MIDI on the forums, I'm sure you'll find some detailed instructions on how to set all this up.  (not to mention the manuals and release notes from the updates).