Found an answer in the Support forum, copied below -
Re: MH 871 as a printer? from HySpeed
"I was finally able to get my cutter to work with my CAD program using the GraphTec CE1000-60 Driver. I downloaded it from
http://www.graphteccorp.com/support/software/programs/ops628.htm
So far I haven't had to do any configuring. Just installed it and it worked."
I haven't tried this myself yet - still waiting for supplies to arrive. Cutter got here next day!