Starkeeper, that is exactly how I use the B4 with my G1000. I route the realtime parts that play the B4 to a seperate output[that is not connected to anything, making a deadend]. Then I can play the arranger as normal, and also a SMF and still be able to play the B4..This way allows me to select the organ patches on the B4, via program change using the"deadend" realtime part, controling the B4..