hey rikki, the patch is selected from within the midi file playing the motif rack (pretty much a standard controller board setup, except the data is being issued form the midi files i have set up....as for sysex, the yamaha is brilliant as everything pretty much is run via controller messages so it makes it easy to program...i am using my own midi config, and yes the sysex has been disabled, it was one of the first things i did when setting it up,not that it really matters as the only sysex file that affects all keyboards is the GM reset (GS, XG for example, whilst similar only work for roland and yamaha boards respectively, as you would already know) so its really a misnomer as its not exclusive to a particular board, all others are keyboard specific ......as i said i am now certain its something to do with the selection of a track for driving the harmoniser...there is something the sd does, which is not documented anywhere BUT, i will figure it out!!!
cheers
dennis