thoward,
If you are sure that the Rocktron will send the expression pedal over MIDI cc, then you can simply set up your Timefactor as I described in the second section of my previous post. You will not have to reprogram all the parameters controlled by the expression pedal, as this action only intercepts expression control from the physical jack and diverts it to a MIDI cc. You'll have to consult the Rocktron manual to set it up on that end though.
-Russ
