Just looking at the Butcher manual (uses the same pedal) -
Found this in the manual - REMOTE SWITCH This eight-pin DIN connector is provided for the connection of the remote footswitch. You must use the included eight-pin cable, as it supplies power to the footswitch. The Butcher can also be controlled remotely via MIDI using a standard five-pin MIDI cable. For a complete description of the MIDI commands, please refer to page 12 of this owner's manual.
Page 12 - heres the buttons
CHANNEL SWITCH Toggles between the Clean channel and the Crunch channel.
EFFECTS LOOP ON/OFF SWITCH Toggles the Effects Loop on or off. When the indicator light is lit, the Effects Loop is active.
CLEAN CHANNEL BOOST Switches on the preamp boost on the Clean channel.
CRUNCH CHANNEL BOOST Switches on the preamp boost on the Crunch channel.
MASTER VOLUME SELECT SWITCH Toggles between the Two Master Volume controls
REMOTE CABLE JACK Connect the included eight-pin cable to the amp's footswitch/MIDI input jack. Note: You must use the included eight-pin cable, as it supplies the footswitchwith power. When using an external MIDI source to control the amplifier, a five-pin MIDI cable can be used. Since the Butcher uses MIDI control, changes made to switches on the amplifier will be reflected by the LED's on the footswitch, and vice versa.
Interestingly enough, it looks like you can change midi channel - Hold the last footswitch (Master) for 2 seconds to enter MIDI channel select mode. The LEDs on the first four footswitches will blink. You can then choose MIDI channel 1, 2, 3 or 4 by pressing one of those. You can also press Master again to cancel the operation.
But that won't allow you to actually do much with CC with the looks of things.
Anyway, you may find this handy.
http://zorkmids.com/?p=1425