I was interested in the Hammond pedals using built-in tones, but the only way to adjust tones (change tone, adjust it) is on the back of the pedal unit. I wish they'd offer a little "remote control" unit to go with their pedals!
Or at least have 5 big footswitches to change tones more easily.
Re: the topic, Viscount MIDI pedals - I don't know for sure, but if they send standard / typical MIDI, they should work fine as any MIDI pedals would work. I have used Roland and Elka pedalboards on Tyros keyboard and they both worked fine once I set up the MIDI receive channels etc.
Best of luck on your pedals project!
Jim