A DROID-3 patch editor for Windows and Mac OS9 using MIDI to transmit the patch and editing data. The first version of DROID-3 can not save patches internally but DroidEdit (at least the Windows version) can save them and even export them individually in the Standard MIDI File format. This allows for importing a into your sequencer where it will work like a regular Program Change.
If your MIDI interface or drivers do not allow for internal MIDI merging, using the editor will prevent your sequencer and mother keyboard from communicating with DROID-3. To play MIDI notes and use the editor you need virtual MIDI routing like MIDI Yoke Junction. One virtual MIDI connection is enough.
Logic 8 environment v1.3
You shouldn't be needing OMS or FreeMIDI to both use your sequencer/mother keyboard with DROID-3 and change its parameters in the editor at the same time in OS X thanks to its MIDI setup.
DroidEdit and MIDI file format
Routing viewer for Windows
You can use this program to understand exactly how the Typ parameter changes the internal routing.