I saw this post in the archive and thought I'd give it a try : http://line6.com/sup...ew/thread/90291.
Works excellently but I use a slightly different method to the original thread. I have it setup so that it enables the high gain channel for specific patches :
Download and install MIDI-OX : http://www.midiox.com/
Send the following SysEx command to the Relay to configure the relay to be closed (clean channel) for specific patches, the relay will be open (high gain channel) for patches not specified in the list :
F0 00 00 50 06 03 00 nn ... nn F7
Where nn ... nn is the list of patches you want the relay closed.
Works like a dream and just makes me wonder why Line6 don't include a relay in the pod to allow amp control direct from the POD.