I've been using DSLR remote for yonks too, it is great, I also teach stop motion to kids and I used to use it all the time for that, until iMotion HD came along.
Chris, can you use the QHY5 via IOXperts? It may be worth contacting them if not and trying to get it supported.
http://www.ioxperts.com/FAQs/faq.html#howhelpusb_anchor
I was hoping something might come via AOSX, but progress seems slow.