Here's an extended version with some extra tracks from a sound module:
http://www.youtube.com/watch?v=Nj2O-ExYzH4
It's really useful for me with my Proteus 2000. I've got it hooked up via SPDIF and i've got input thru set to on.
Allows me to record the proteus straight into the track witohut having to sample it, assign it then chop and lay it down or whatever.
Just a shame my keyboard skils aren't too hot, takes me a few attempts to get something down
As guesswhosback said, it saves a fair bit of time but definitely can be worked around