I know it can be done. I just don't know if any additional hardware will be needed. I'm looking to run a program like Amplitube on my computer (Windows) / iPad, with a MIDI pedal to switch between preset stomp / amps. As of right now, I don't have any of the equipment (other than an iRig, which I don't even know if it would be used in this setup), but I am familiar with Amplitube, as I've used it in the past. Features of Amplitube I like are; the ability to switch amps and run them in 'cabinets', a large variety of stomp pedals, presets, and wah/volume pedals.
If there are any other reliable options, I'll take suggestions. From what I've read, you can program the MIDI pedal with presets instead, but I like the on the fly options of Amplitube.
Read more: How to rig up iPad with MIDI pedal?