I use vArranger2 for almost all my musical endeavours because it is such a delight to work with, however since purchasing a SD1000 I have number of big band arrangements which allows me to play the vocal part. I load the midi file into vArranger and using sound edit change the general midi patches into the SD1000 patches which affords me a lot more and better sounding instruments, but there is no way, at least not what I have found, to save the altered midi file which means the next time I load the file I have go though the same routine of altering the bank and patches.
Sound edit is so easy to use it seems a pity that you not save the altered file.
Eric