Here are a couple videos:
The first is Momentary Scene Change:
http://www.youtube.com/watch?v=aSDZpZmqddo
Latching scene mode (which can also be done on the M13):
http://www.youtube.com/watch?v=ztIS-GubTD4
I have mine setup like the first video's momentary scene mode, and instead of songs, I have it setup with all channel possibilities and basically have the "scenes" as follows:
Scene # - Amp mode
1 - ch 1; 2 - ch 1 + FX Loop; 3 - ch 1 + Solo Boost
4 - ch 2; 5 - ch 2 + FX Loop; 6 - ch 2 + Solo Boost
7 - ch 3; 8 - ch 3 + FX Loop; 9 - ch 3 + Solo Boost
10 - ch 2 + 3; 11 - Ch 3 +2; 12 - ch 1
Hope to set up the Midi changes sometime this week.
I have yet to experiment with running a 4 to 7 Cable method (running a stereo rig) to see how the delay/reverb effects do in the loop. If I like these effects in the loop, then the FX Loop might be engaged on everything. I have the pedal setup to run effect banks 3 and 4 through the loop (which are all delays and reverbs), and modulations, overdrives, compression in front of the amp. Hope this aids in your research.
-AJH